Question

The demension of the room are 5mx4mx3mx .find the cost of white washing the walls of the room and celling at the rate of R.s 11.5per m

Answer 1

Answer:

Rs.862.5

Step-by-step explanation:

Here, length, l = 5m

breadth, b = 4m

height, h = 3m

LSA(Area of 4 walls) = 2(l + b)h

LSA = 2(5 + 4)3

LSA = 2 * 9 * 3

LSA = 54 $m^{2}$

Area of Roof , A = l * b

A = 5 * 4

A = 20 $m^{2}$

Total Area of whitewashing = 54 + 20 = 74 $m^{2}$

Cost of whitewashing 1$m^{2}$ = Rs. 11.5

Hence Cost of whitewashing 74 $m^{2}$ = 74 * 11.5 = Rs.862.5