Three persons can build a small house in 8 days. To build the same house in 6 days how many persons are required?

Complete the following activities 3 persons can build a small house in 8 days. Complete the following activity to find the number of Persons required to build the same house in 6 days. Let x persons are required to build the house in 6 days. The number of Persons and the number of days required to build a house are in inverse proportion. Therefore, he product of the number of persons and the number of days is constant.

If 15 workers can build a wall in 48 houi how many workers will be required to di the same work in 30 hours?

If 15 workers can build a wall in 48 hours.How many workers will be required to do the same work in 72 hours?

In how many ways can 7 persons sit around a table so that all shall not have the same neighbours in any two arrangements?

The radius and height of cylindrical water reservoir is 2.8 m and 3.5 m respectively. How much maximum water can the tank hold? A person needs 70 liters ofr water per day. For how many persons is the water sufficient for a day? (pi = 22/7. ) .

There are 12 seats in a mini bus and 8 persons are to be seated in it. In how many ways can they be seated?

Bricks of dimensions 15 cm times 8 cm times 5 cm are used to build a wall of dimensions 120 cm times 16 cm times 200 cm . How many bricks are used?