Question

6 pump can empty a tank in28 min how much time taken in 4 pump​

Answer 1

Given:

✰ 6 pump can empty a tank in 28 min.

To find:

✠ How much time taken in 4 pumps?

Solution:

Let's understand the concept first! First we will assume that the time taken by 4 pumps to empty tank be x, then we will see when the number of pumps decrease, the time taken to empty the tank will increase that means both the number of pumps and time vary inversely. If one quantity is decreasing the other quantity is increasing. Therefore, it is a case of inverse variation.

Let the time taken by 4 pumps to empty tank be x

∵ It is a case of inverse variation

➣ 6 × 28 = 4 × x

➣ x = (6 × 28)/4

➣ x = 168/4

➣ x = 42

∴ Time taken by 4 pumps to empty tank = 42 minutes

Answer 2

Given :

6 pump can empty a tank in 28 min.

To find :

How much time taken in 4 pump.

Solution :

6 × 24 = 4 × x

x = (6 × 24)/8

x = 168/8

x = 42

Time taken by 4 pumps to empty tank is 42 minutes.