4. Four mark example problems II

1. The radius of a circular cricket ground is \(76 \ m\). A drainage \(2 \ m\) wide has to be constructed around the cricket ground for the purpose of draining the rain water. Find the cost of constructing the drainage at the rate of \(₹180/-\) per \(sq.m\).

 

 

The cost of constructing the drainage \(= ₹\)

 

2. A floor is \(10 \ m\) long and \(8 \ m\) wide. A carpet of size \(7 \ m\) long and \(5 \ m\) wide is laid on the floor. Find the area of the floor that is not covered by the carpet.

 

Answer:

 

Total area of the floor that is not covered by the carpet \(=\)  \(m^2\)