How many minutes does it take to travel 120 miles at 400 miles per

Question

How many minutes does it take to travel 120 miles at 400 miles per hour?

(A) 3
(B) 3 1/3
(C) 8 2/3
(D) 12
(E) 18

Bunuel · Accepted Answer

SOLUTION

How many minutes does it take to travel 120 miles at 400 miles per hour?

(A) 3
(B) 3 1/3
(C) 8 2/3
(D) 12
(E) 18

(Time) = (Distance)/(Rate) = 120/400 = 3/10 hours = 3/10*60 minutes = 18 minutes.

Answer: E.

nutshell · Answer

Distance, D = 120 miles;
Rate, R = 400miles/hr;

Time, T = D/R = (120/400) hours = 0.3 hours;

The question asks us the answer in minutes; Therefore, 0.3 * 60 mins = 18 mins;

(E) is the answer.

Cbri · Answer

When working on a rate question (one involving distance or work) remember to always jot down the formula - Distance = speed*time. Also make sure to be aware of the units used and the possible need for conversion.

The rate is given in miles/hour, but we are looking for an answer in miles/minute

D=S*T
120 miles = 400 miles/hr * 1 hr/60 min * T
120 miles = 20 miles/3 mins * T
120 miles * 3 mins/20 miles = T
18 minutes = t Answer Choice E

Remember you can save time on this problem by calculating in fewer steps; I described every step to give a comprehensive view to students of all different levels. Remember that you have approximately 2 minutes to solve a GMAT Quantitative Question (you need to answer every question in the section), so whenever you can save time please do

kinjiGC · Answer

Difficulty level : sub 500 (not even required to calculate).

120/400 * 60 = 18 mins - Option E)

AKG1593 · Answer

400 miles=1 hr or 60 min.
1 mile=6/40 min.
120 miles=6/40*120=18 min.
Ans:E

shasadou · Answer

it takes 15 min to make 100 miles, so we cut-off 4 choices.

rishi02 · Answer

(120/400)*60 = 18 mins

adiagr · Answer

Time = \frac{Distance}{Speed}

Time = \frac{120}{400} Hours. (Note the units)
For getting answers in minute, multiply it by 60 (1 hour = 60 minute)
= 18 minutes

E is the answer.

Anisha1637 · Answer

Time= Distance / Speed
= 120/400
=3/10 hours
=(3/10)*60 minutes
= 18 minutes

BrentGMATPrepNow · Answer

Time = distance/rate 
Plug-in values to get: Time = (120 miles)/(400 miles per HOUR) 
= 120/400 HOURS
= 12/40 HOURS
= 3/10 HOURS
So the travel time = 3/10 of  one HOUR 
Replace one HOUR with 60 minutes to get: travel time = 3/10 of  60 MINUTES 
Simplify: : travel time = 18  MINUTES

Answer: E

ScottTargetTestPrep · Answer

It takes 120/400 = 12/40 = 3/10 hours or 3/10 x 60 = 18 minutes to travel 120 miles at 400 mph.

Answer: E

bumpbot · Answer

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.

How many minutes does it take to travel 120 miles at 400 miles per

Prep Toolkit

Top 5 GMAT Debrief Videos

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

GMAT Problem Solving (PS) Questions

How many minutes does it take to travel 120 miles at 400 miles per

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