Question

an engine pumps out of 850 liters of water in one minute. how many hours will it take to pump out 1377000 liters of water

Answer 1

Answer:

1377000 liters of water out in 27 hours.

Step-by-step explanation:

Given : An engine pumps out of 850 liters of water in one minute.

To find : How many hours will it take to pump out 1377000 liters of water ?

Solution :

850 liters of water out in one minute.

1 liter of water out in $\frac{1}{850}$ minutes.

Then, 1377000 liters of water out in $1377000\times \frac{1}{850}$ minutes.

1377000 liters of water out in 1620 minutes.

We know that,

1 hour = 60  minutes

1 minute = $\frac{1}{60}$ hours.

1620 minute = $1620\times \frac{1}{60}$ hours.

1620 minute =27 hours.

Therefore, 1377000 liters of water out in 27 hours.

Answer 2

Answer:

It takes 27 hours to pump out 1377000 litres of water.

Step-by-step explanation:

To solve this problem, we can use Unitary Method.

Accordingly,

Given, Time taken to pump 850 litres of water = 1 minute

∴ Time taken to pump 1 litre of water =  $\frac{1}{850}$ minutes

∴ Time taken to pump 1377000 litre of water = $\begin{array}{l}{=\frac{1}{850} \times 1377000 \text { minutes }} \\ {=1620 \text { minutes. }} \\ {=\frac{1620}{60} \text { hours. }} \\ {=27 \text { hours }}\end{array}$

Thus, it will take 27 hours to pump out 1377000 litres of water.