The dimensions of a room are 12.5 metres by 9 metres by 7 metres. The…

Question

The dimensions of a room are 12.5 metres by 9 metres by 7 metres. There are 2 doors and 4 windows in the room; each door measures 2.5 metres by 1.2 metres and each window 1.5 metres by 1 metre. Find the cost of painting…

Accepted Answer

Option B. Rs. 1011.50. Answer & Solution Answer: Option B Solution: Area of 4 walls : & = 2 ( l + b ) × h & = [ 2 ( 12.5 + 9 ) × 7 ]m^2 & = 301\,m^2 Area of 2 doors and 4 windows : & = [ 2 ( 2.5 × 1.2 ) + 4 ( 1.5 × 1 ) ]m^2 & = 12\,m^2 ∴ Area to be painted : & = ( 301 - 12 )m^2 & = 289\,m^2 Cost of pa…

The dimensions of a room are 12.5 metres by 9 metres by 7 metres. There are 2 doors and 4 windows in the room; each door measures 2.5 metres by 1.2 metres and each window 1.5 metres by 1 metre. Find the cost of painting the walls at Rs. 3.50 per square metre.

Solution