Question

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

Answer 1

Step-by-step explanation:

We have

Area of 4 walls =2(l+b)h=2(12.5+9)×7=301m

2

Area of doors and windows =2(2.5×1.2)+4(1.5×1)=12m

2

Area to be painting =(301−12)=289m

2

Hence, cost of painting =Rs.289×3.5=Rs.1011.50