Question

What is the cost of painting the wall at the rate of ₹5 per square meter?(The dimensions of the door are b = 2.4 m and h = 1.2 m. and the total area inclusive of the door is equal to (8 m $\times$ 4 m)

• A. ₹155.60
• B. ₹152.8
• C. ₹100
• D. ₹158

Answer 1

The correct option is B

₹152.8

Since the door is not to be painted, we have to subtract the area of door from the total area.

Total area = 8 m $\times$ 4 m = 32 $m^2$

Door’s area =$\frac{1}{2}\times 2.4m\times 1.2m=\frac{2.88}{2}{m}^2=1.44m^2$

Area to be painted = (32 – 1.44) $m^2$ = 30.56 $m^2$

Cost =₹5/$m^2$

Money to be paid for wall getting painted = ₹$5\times$ 30.56 =₹152.8