Question

6 pipes are required to fill a tank in 1 hour. How long will it take if only 5 pipes of the same type are used? ​

Answer 1

Answer:

5/6 or 0.83hr

Step-by-step explanation:

6 pipes in 1 hour

using unitary method,

1 pipe in 1/6hr

so, 5 pipes in = (1*5)/6 = 5/6hr

Answer 2

Given:

6 pipes are required to fill a tank in 1 hour.

To Find:

How long will it take to fill the tank with 5 pipes?

Solution:

1. A tank can be filled in 1 hour using 6 pipes

=> If 6 pipes can fill the tank in 1 hour,

=> The time taken by 1 pipe to fill the tank is 1 x 6 hours,

=> The time that is taken by 1 pipe to fill the tank = 6 hours,

=> 1 pipe can fill the tank in 6 hours.

2. The time taken by 5 pipes to fill the tank can be calculated as follows,

=> If 1 pipe can fill the tank in 6 hours,

=> 5 pipes can fill the tank in 6/5 hours,

=> 5 pipes can fill the tank in 1.2 hours,

=> Total time taken by 5 pipes to fill the tank = 1.2 hours = 1.2 x 60 minutes = 72 minutes.

Therefore, the total time taken by 5 pipes to fill the tank is 1.2 hours (OR) 72 minutes.