Q25 of 106 Page 310

Fill in the blanks to make the statements true:

If 12 pumps can empty a reservoir in 20 hours, then time required by 45 such pumps to empty the same reservoir is …………. hours.

∵ 12 pumps can empty a reservoir in 20h.


∴ 1 pump can empty in 20 × 12 i.e. 240h.


Then, 45 pumps can empty the same reservoir in


⇒


⇒


⇒ 5× 60 + 20


⇒ 5h 20min


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