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
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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.
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