The Eurostar is a line of high-speed trains that provide fast, efficie

Question

The Eurostar is a line of high-speed trains that provide fast, efficient, and eco-friendly travel all over Europe. Under normal travel conditions, the Eurostar produces fuel emissions of  CO_{2}  at a rate of E kilograms per kilometer (E kg/km) when it is traveling at a constant speed of T kilometers per hour (T km/hr).

In terms of the variables E and T, select the expression that represents  CO_{2}  fuel emissions produced in 1 hour by the Eurostar traveling at a constant speed, T, under normal traveling conditions, and select the expression that represents the amount of  CO_{2}  emitted by the Eurostar traveling at a constant speed, T, under normal traveling conditions, for 200 kilometers. Make only two selections, one in each column.

Archit3110 · Answer

Emission rate is E kg/km
constant speed of T kilometers per hour (T km/hr).

1. Co2 emissions done in 1 hr at a constant speed, T, under normal traveling conditions>
total distance travelled will be T kms
Emissions done in T kms will be E ( kg/km) * T ( km) :  ET Kg

2. normal traveling conditions, for 200 kilometers
Distance 200 km
 200 E kgs

RheaBhatia0302 · Answer

CO2 emitted in 1 hour -  ET

CO2 emitted in 200 kilometer -  200E

pintukr · Answer

The Eurostar is a line of high-speed trains that provide fast, efficient, and eco-friendly travel all over Europe. Under normal travel conditions, the Eurostar produces fuel emissions of CO2 at a rate of E kilograms per kilometer (E kg/km) when it is traveling at a constant speed of T kilometers per hour (T km/hr).

In terms of the variables E and T, select the expression that represents CO2 fuel emissions produced in 1 hour by the Eurostar traveling at a constant speed, T, under normal traveling conditions, and select the expression that represents the amount of CO2 emitted by the Eurostar traveling at a constant speed, T, under normal traveling conditions, for 200 kilometers.

Make only two selections, one in each column.

QUESTION 1

(I) CO2 emitted in 1 hour

Emission Rate = E kilograms / km

Constant speed = T km / hour

So, Emissions in 1 hour = (E kilograms / km) x (T km / hour )
 = ET

ET is the CORRECT answer

QUESTION 2

(II) Emissions in 200 kilometer

Emission Rate = E kilograms / km
So, Emissions in 200 kilometer = 200 x E
 = 200E

200E is the CORRECT answer

Oppenheimer1945 · Answer

emission in 1 hr= ET
emission in 200km=200E

$!vakumar.m · Answer

Under normal travel conditions, the Eurostar produces fuel emissions of CO2 at a rate of E kilograms per kilometer (E kg/km) when it is traveling at a constant speed of T kilometers per hour (T km/hr).

In terms of the variables E and T, select the expression that represents CO2 fuel emissions produced in 1 hour by the Eurostar traveling at a constant speed, T, under normal traveling conditions
E kg/km when travelling at T km/hr
so in 1 hour the CO2 fuel emissions is given by expression - ET Kg

Select the expression that represents the amount of CO2 emitted by the Eurostar traveling at a constant speed, T, under normal traveling conditions, for 200 kilometers. 
For 200km, the CO2 fuel emissions = 200E

Answer: ET kg and 200E kg

RahulJain293 · Answer

IMO
ET
200E

In terms of the variables E and T, select the expression that represents  CO2 fuel emissions produced in 1 hour by the Eurostar traveling at a constant speed, T, under normal traveling conditions , and select the expression that represents the  amount of CO2 emitted by the Eurostar traveling at a constant speed, T, under normal traveling conditions, for 200 kilometers . Make only two selections, one in each column.

CO2 fuel emissions produced in 1 hour by the Eurostar traveling at a constant speed, T, under normal traveling conditions

Solution:

It would be E*T since we need values kg/hr, we multiple to get rid of the km
ie., E kg/km * T km/hr = gives us E*T kg/hr
 Hence ET

Amount of CO2 emitted by the Eurostar traveling at a constant speed, T, under normal traveling conditions, for 200 kilometers

Solution: 
1 km emits E kgs
200 kms emits x kgs

Hence we have  x = E*200

Catman · Answer

Rate of CO2 emitted in kilograms per Kilometer = E(kg/km)
Speed = T Kilometer per hour (Tkm/hr)
Distance travelled in 1 hour= T km
 CO2 emitted IN 1 hour= ET (Kg)

Time taken to cover 200km at T speed= 200 / T hours
Fuel emissions of CO2 at a rate of E kilograms per kilometer (E kg/km) when it is traveling at a constant speed of T kilometers per hour (T km/hr).
Fuel emission for 200km at a constant speed T will be 200E (Kg)
 CO2 emitted in 200 kilometer =200E (Kg)

rn1112 · Answer

(A) CO-2 emitted in 1 hour

It has been provided that :-

Emission rate is E kgs / km
Speed of Eurostar train is T km/hr

In 1 hour, the total Emission will be= (E kgs/km) * (T km/hr )
 = ET

The correct option will be ET

(B) CO-2 Emissions in 200 kilometer

Emission rate is = E kgs / km
Total CO-2 Emissions in 200 kilometer = E * 200
 = 200E

The correct option will be 200E

(A) CO-2 emitted in 1 hour = ET
(B) CO-2 Emissions in 200 kilometer = 200E

TenthCentury · Answer

CO 2  emitted in 1 hr =  ET 
CO 2  emitted in 200kilometer =  200E

Sajjad1994 · Answer

Hello Everyone!

OA to this question is posted, it is:

CO_{2}  emitted in 1 hour:   ET 
  CO_{2}  emitted in 200 kilometer:   200E

The competition mode is off now, the OE will be posted soon.

Thank you all of you for participating. This competition is ended now. I will post the final result tomorrow at approximately 8 am Pacific.

Cheers.

Sajjad1994 · Answer

Official Explanation

The total amount of CO2 emitted equals the number of kilograms per kilometer times the number of kilometers. At a rate of T km/hr, the Eurostar travels T km in 1 hour, so the CO2 emitted in that hour is E (the number of kilograms per kilometer) times T.

The total CO2 emitted in 200 kilometers equals E (the number of kilograms per kilometer) times the number of kilometers, 200.

Answer: 
   CO_{2}  emitted in 1 hour:   ET 
  CO_{2}  emitted in 200 kilometer:   200E

sahildesai360 · Answer

I really dont understand how to do this question at all despite the responses given. Is there a way to use smart numbers here?

cheshire · Answer

That is a possible way of solving it.

For instance, let
 
 E = 1 kg/km (so the train emits 1 kg of CO2 for every kilometer), 
 T = 10 km/hr (so in one hour it goes 10 km).

2. Compute “real” emissions
 
 In one hour at 10 km/hr, it travels 10 km ⇒ emits 10 kg. 
 In 200 km at 1 kg/km ⇒ emits 200 kg.  
3. Plug into each formula
   Expression 
 With E=1, T=10 
 Value 
 Matches? 
 
  ET 
 1·10 
 10 
 matches 1-hour (10 kg) 
 
  200E 
 200·1 
 200 
 matches 200 km (200 kg) 
 
  E/200 
 1/200 
 0.005 
 nope 
 
  T/200 
 10/200 
 0.05 
 nope 
 
  T/E 
 10/1 
 10 
 matches only the 1-hr but wrong symbolically for 200 km

\(CO_{2}\) emitted in 1 hour	\(CO_{2}\) emitted in 200 kilometer	Expression
		\(200E\)
		\(\frac{E}{200}\)
		\(ET\)
		\(\frac{T}{200}\)
		\(\frac{T}{E}\)

The Eurostar is a line of high-speed trains that provide fast, efficie

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Expression	With E=1, T=10	Value	Matches?
ET	1·10	10	matches 1-hour (10 kg)
200E	200·1	200	matches 200 km (200 kg)
E/200	1/200	0.005	nope
T/200	10/200	0.05	nope
T/E	10/1	10	matches only the 1-hr but wrong symbolically for 200 km

GMAT Two-part Analysis (TPA) Questions

The Eurostar is a line of high-speed trains that provide fast, efficie

Prep Toolkit

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards