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 $=$  $m^2$