So, we should take a rest so that___

Correct option is (D) \(7\,\frac{1}{2}\) hrs \(\because\) Time taken to fill a \(50\,l\) of tank = 5 hours \(\therefore\) Time taken to fill a \(75\,l\) of tank \(=\frac5{50}\times75\;hours\) \(=\frac{75}{10}\;hours\) = 7.5 hours = 7 hours + \(\frac12\) hours = \(7\frac12\) hours

He could help you provided that he was not busy.

Restless life is risky. We have to take rest, to regain our strength.

We should keep in mind that health is the greatest wealth.

We must eat balanced diet so that we can be healthy.

But it should be kept in mind that leisure is also a part of our daily activities.

If a man does not take a rest after a work, he becomes weak and spiritless.

It is so delicious that almost everyone likes to eat it.

We should inspire the students so that they can cultivate the habit of reading books.