2 large and 1 small pumps can fill a water tank in 4 hours. 1 large and 3 small pumps can also fill the same water tank in 4 hours . How many hours will it take for 3 large 4 small pumps to fill the tank?

Created: 7 years ago | Updated: 3 years ago

Updated: 3 years ago

2 hours

2.5 hours

3 hours

3.5 hours

None of these

Trust Bank Ltd Trust Bank Ltd - Assistant Officer - 30.03.2012 গণিত নল ও চৌবাচ্চা (Pipes and cistern)

Des

Best Ans:

Here, 2 large and 1 small pumps ≡ 1 large and 3 small pumps

Again, 3 large and 4 small pumps

= 2 large and 1 small pumps + 1 large and 3 small pumps

= 2 large and 1 small pumps + 2 large and 1 small pumps

= 2 x (2 large and 1 small pumps)

Now, 2 large and 1 small pumps can fill the tank in 4 hours

So, 2 x (2 large and 1 small pumps) can fill the tank = 4/2 = 2 hours

7 years ago

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Md Azizur Rahman

FOUNDER OF SATT

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