Question

The dimensions of a room are (9m×8m×6.5m).It has one door of dimensions(2m×1.5m)and two windows each of dimensions(1.5m×1m).Find the cost of whitewashing the wall at RS 6.40per square meter

Answer 1

Answer:

Length of room = 9 m

Breadth of room = 8 m

Height of room = 6.5 m

TSA of room = 2(lb + bh + hl) – lb [Floor is excluded] = 2[9x8 + 8x6.5 + 6.5x9] – 9x8 = 293 sq m

Area of one door = 2 x 1.5 = 3 sq m

Area of 2 windows = 2 x 1.5 x 1 = 3 sq m

Area of walls to be white washed = 293 – 6 = 287 sq m

Cost of white washing the walls at Rs 6.40 per sq m = Rs 6.40 x 287 = Rs 1836.80

I hope it helps you...