Question

. The size of a classroom is 6 m by 5 m by 4 m. Leaving one door of size 2 m by 1 m and two
windows of size 1 m by 60 cm, the four walls were painted by an artist. How much would he
charge at the rate of 10 per sq. m.​

Answer 1

1)the dimensions of the room

L=6m,B=5m,H= 4m

area of the four walls (A) = 2(L+B)H =2(6+5)4 =2*11*4 =88 sq m---(1)

2) dimension of the door

l1=2m, b1 = 1m

area of the door (A1) = l1b1 = 2m *1m = 2m²---(2)

3) dimensions of the window

l2=1m

b2 = 60cm = 0.6 m

area of the 2 windows = 2 * l2b2 = 2*1m*0.6m =1.2 m²---(3)

4) total area of the walls painted = (1) -(2)-(3)

= 88 - 2 -1.2

=88- 3.2

=84.8 m²

cost of painting 1m² area = Rs 10

cost of painting total area = 10 * 84.8 = Rs 848

Step-by-step explanation:

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