Question

if 12 pumps working 7 hours a day can lift 2800 tons of water in 20 days in how many days can 20 pumps working 9 hours a day can lift 300 tons of water? can anyone please explain me this amswer

Answer 1

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MATHS

If 18 pumps can raise 2170 tonnes of water in 10 days working 7 hours a day then in how many days will 16 pumps raise 1736 tonnes of water working 9 hours a day

A .

6

B .

7

C .

8

D .

9

December 20, 2019

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Jeeva Ansari

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ANSWER

18 pumps raise 2170 tonnes in 10 days working 7 hours a day.

In 1 day they raise

10

2170

=217 tonnes

In 1 hour they raise

7

217

=31 tonnes.

1 pump raises water =

18

31

tonnes.

Now,

16 pumps will raise =

18

31

×16 tonnes.

Working 9 hrs a day they will raise =

18

31

×16×9 tonnes

Let the number of days be d days.

Thus total =

18

31

×16×9×d

1736=

18

31

×16×9×d

⇒d=1736×

9×16×31

18

=7 days.