Question

50. What will be the cost of paper, 2 metres wide, at 3p. per metre, for papering
walls of a room 21 metres long, 15 metres broad and 10 metres high?​

Answer 1

Answer:

As the room is a cuboid ,

so, we have to find the lateral surface area of the cuboid i.e,four walls of the room,

so,

we know that lateral surface area of a cuboid(in this case a room) =2h(l+b)

Length (l)=16m

Breadth(b)=12m

Height(h)=8m

by applying the formula we get,

2*8(16+12)

= 16*28

=448 m^2

now, it is given that to paper the wall with 2m wide paper

so,

448÷2=224

papering at Rs. 50 per metre

so,224×50= Rs.11,200

Step-by-step explanation: