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

Question

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

Toppr Admin · Accepted Answer

-5- h- 20- minutes-12- pumps take -20- hours-1- pump will take -12-times 20-240- hours-45- pumps will take -dfrac-240-45-hr-dfrac-240-times 60-45-dfrac-144400-45-320- minutes-5- h- 20- min-

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

$$5\ h\ 20$$ minutes
$$12$$ pumps take $$=20$$ hours
$$1$$ pump will take $$=12\times 20=240\ hours$$
$$45$$ pumps will take $$=\dfrac{240}{45}hr$$
$$=\dfrac{240\times 60}{45}=\dfrac{144400}{45}=320$$ minutes
$$=5\ h\ 20\ min$$

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

$$5\ h\ 20$$ minutes$$12$$ pumps take $$=20$$ hours$$1$$ pump will take $$=12\times 20=240\ hours$$$$45$$ pumps will take $$=\dfrac{240}{45}hr$$$$=\dfrac{240\times 60}{45}=\dfrac{144400}{45}=320$$ minutes$$=5\ h\ 20\ min$$

$$5\ h\ 20$$ minutes
$$12$$ pumps take $$=20$$ hours
$$1$$ pump will take $$=12\times 20=240\ hours$$
$$45$$ pumps will take $$=\dfrac{240}{45}hr$$
$$=\dfrac{240\times 60}{45}=\dfrac{144400}{45}=320$$ minutes
$$=5\ h\ 20\ min$$