Bissoy.com
Doctors Medicines MCQs Q&A

  1. \(2\dfrac{1}{2}\)
  2. 3
  3. 2
  4. \(1\dfrac{1}{2}\)
5 views

1 Answers

Option 3 : 2

Given:

Pipe A can fill a tank in 4 hours

Pipe B can fill a tank in 6 hours

Pipe C can empty the tank in 3 hours

Formula used:

Work done = Time × Efficiency

Time ∝ 1/Efficiency

Calculation:

In one hour pipe, A can fill 1/4

In one-hour pipe, B can fill 1/6

In one-hour pipe, C can empty 1/3

Pipe A and B are opened for 2 hours

(1/6 + 1/4) × 2 = 5/6

Empty tank left

1 - 5/6 = 1/6

Now, C is opened

1/4 + 1/6 - 1/3 = 1/12

No tank will be filled in

= (1/6)/(1/12) = 12/6 = 2 hours

∴ The tank is filled in the next 2 hours after pipe C is opened.

5 views

Related Questions

In the following question, two statements are numbered as A and B. On solving these statements, we get quantities A and B respectively. Solve both quantities and choose the correct option. Quantity A: There are two inlet pipes A, B and two outlet pipes C, D inlet pipe B takes 7 hours more to fill the tank when compared to A. Two outlet pipes when working together can empty the tank in 3.5 hours and efficiency of both the pipe is same if all of them working together can fill the tank in 2 hours. Calculate the time taken by A to fill the tank. Quantity B: The ratio of efficiencies of two pipes A and B is in the ratio 3 ∶ 2 and that of pipe B and C is 1 ∶ 3. Pipe A and B are inlet pipes, pipe C is outlet pipe working together they can fill the tank in 7.5 hours. Calculate the time taken by A to fill the tank when working alone.?
1 Answers 10 Views