Question

a room is 4.5m long, 3.4m wide and 210 cm high. find out the cost of painting the room at the rate of rs.25 per m² ​

Answer 1

Step-by-step explanation:

Length=4.5m

Breadth=3.4m

Height= 210cm = 2.1 m

So, 4.5×3.4×2.1 =32.13 m²

Rate of painting= 25 per m²

Cost of painting = 25× 32.13

= 803.25

Answer 2

Step-by-step explanation:

length of room =4.5m

breath of room =3.5m

height of room =2.1m

we paint only for free sides of room only not for floor so,

we have to find LSA of room

LSA=2h(l+b)

=2x2.1(4.5+3.5)

=33.6 sq. cm

cost of painting =25x33.6=840 rs