Question

The dimension of a room are (9m×8m×6.5). It has one door of dimension 2m×2.5m and two windows each of dimension 1.5m×1m. Find the cost of whitewashing the wall at rate 25 per square meter?..

Answer 1

Answer:

₹7,125

Step-by-step explanation:

Total area to be whitewashed = Area of four walls and the ceiling - Area of the door - Area of two identical windows.

=2x(9mx6.5m + 8mx6.5m) + 9mx8m - 2mx2.5m - 2x1.5mx1m

=9mx13m + 8mx13m + 72$m^2$ - 5$m^2$ - 3$m^2$

=221$m^2$ + 64$m^2$ = 285$m^2$

Cost of whitewashing the wall @₹25 per square meter = ₹285 x 25 = ₹7,125