Concept of Unitary Method (Including Time and Work)

125 pupil have food sufficient for 18 days. If 25 more pupil join them, how long will the food last now ? What assumption have you made to come to your answer ?

A carpenter prepares a new chair in 3 days, working 8 hours a day. Atleast how many hours per day must he work in order to make the same chair in 4 days?

A man earns ₹5,800 in 10 days. How much will he earn in the month of February of a leap year?

A machine is used for making rubber balls and makes 500 balls in 30 minutes. How many balls will it make in 3 1/2 hours?

In a school’s hostel mess, 20 children consume a certain quantity of ration in 6 days. However, 5 children did not return to the hostel after holidays. How long will the same amount of ration last now?

The cost of `3/5` kg of ghee is ₹ 96; find the cost of:

(i) one kg ghee

(ii) `5/8` kg ghee

`3 1/2` m of cloth costs Rs. 168; find the cost of `4 1/3` of the same cloth.

Weight of 8 identical articles is 4.8 kg. What is the weight of 11 such articles?