A hole drained 5/8 of a pool in two hours. How long will it take the

Question

A hole drained 5/8 of a pool in two hours. How long will it take the hole to finish emptying the pool if it continues at the same rate?

A. 1 hour and 10 minutes
B. 1 hour and 12 minutes
C. 1 hour and 20 minutes
D. 3 hours and 12 minutes
E. 3 hours and 20 minutes

sumitkrocks · Answer

5/8 in 2 hrs
3/8 in 2*3/5 hrs
Entire in 2+6/5 = 16/5 = 3.2 hrs i.e 3hrs 12 minutes

D is the answer

Archit3110 · Answer

total units of pool 8
empty pool in 2 hours ; 5 units
rate per unit ; 2.5
so for 8 units total time ;
8/2.5 ; 3.2 hrs ; 3hrs : .2*60 ; 3 hrs : 12mins
emptying of poll will take 3:12-2:00 ; 1:12 mins
option B

TarunKumar1234 · Answer

A hole drained 5/8 of a pool in two hours. How long will it take the hole to finish emptying the pool if it continues at the same rate?

There are 8 parts and 5 parts took 2 hrs.
So, rate = 5/2 = 2.5 part/hr.

Remaining 3 parts require, time = 3/2.5 = 1 hr 12 min

It is B.

asishron29181 · Answer

Water drained in 2 hours = 5/8(tank)
Water drained in 1 hour = 5/16(tank)
Time taken by tank to completely drain the water = 16/5 = 3 hour 12 mins.

IMO D

andreagonzalez2k · Answer

I think correct answer is B because it says:
"How long will it take the hole to  finish  emptying..."
You don't have to add the previous 2 hours.

EgmatQuantExpert · Answer

Given  
 • A hole drained 5/8 of a pool in two hours.

To find  
 • The time it will take for the hole to empty the pool at the same rate.

Approach and Working out  :
 • Drained 5/8 of the pool in – 2 hours.
• Time to drain 1/8 of the pool – 2/5 hours
• Time to drain pool completely – 8 × 2/5 = 16/5 = 3.2 H = 3H 12 mins

Hence, option D is the correct answer.
  Correct Answer: Option D

NightWalker · Answer

IMO B.

"How long will it take the hole to finish emptying the pool"

192 minutes (total time taken to empty the pool) - 120 minutes (as 5/8th is already drained = 1 hour 12 minutes.

AndrewN · Answer

Hello, everyone. I am a little surprised to see this question hovering around 50 percent, despite the small sample size. The following are two other ways you could solve this problem in no time.

Method #1  : Set up a proportion (parts drained/hours) and cross-multiply.

\frac{5}{2} = \frac{3}{x}

5x = 6

x = \frac{6}{5}

A fifth of an hour is 12 minutes (60/5), so the time necessary to drain 3/8 of the pool is 1 hour, 12 minutes.   (B) is the answer  .

Method #2  : Work with the rate given and solve.

Another way to interpret the rate given is to think of the hole as draining 10/16 of the pool in 120 minutes.   Since 1/10 of any number is that number with the decimal pushed one place to the left, we can deduce that draining 1/16 of the pool would take 12 minutes.   Now that we know the rate for each 16th, we can calculate that draining the remaining 6/16 of the pool would take 6 times 12 minutes.

6 * 12 = 72

72 minutes is 1 hour, 12 minutes. Again,   the answer must be (B)  .

Keep in mind, these solutions are  in addition to  those already provided in the thread. Get creative with these problems. You never know what you might come up with in a pinch on test day.

Good luck with your studies.

- Andrew

rahulms94 · Answer

5/8 in 2 hrs
So why not calculate with 5/16 in 1 hr?
So the remaining portion is the pool to fill is 1-5/16= 11/16 right???

So, no of hrs taken to empty 11/16th of the pool
11/16 * 16/5 =11/5
Why is this wrong?
Someone please help

Posted from my mobile device

bumpbot · Answer

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A hole drained 5/8 of a pool in two hours. How long will it take the

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A hole drained 5/8 of a pool in two hours. How long will it take the

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