Question

Find the cost of papering the four walls of a room 16m long, 12m broad and 8m high, with paper 2m wide at Rs 50 per metres.

Answer 1

$50 per square meter


the surface area of a rectangular prism with Legnth Widh and Height is
SA=2(LW+LH+WH)
so

L=16
W=12
H=8

SA=2(16*12+16*8+12*8)
SA=2(192+128+96)
SA=2(416)
SA=832 square meters

at 50 per square meter

so times 832 by 50 to get 41600

the cost is 41600 monies