Question

a door of lenght 2m and breath 1m is fitted in the wall. the lenght of the wall is 4.5m and the breath is 3.6m . find the cost of white washing the wall at the rate of Rs.20 per meter square

Answer 1

First find the area of wall then the door

Area of wall=4.5×3.6

=16.2 m square

Area of door =2×1

=2m square

Area of white washing =16.2-2

=14.2 m square

Cost of white washing =20 ×14.2

=RS. 284