Question

A square room of side 56dm is to be carpeted with a carpet of 70 cm width. Find the length of the carpet.

Answer 1

answer:

given:

square room of side = 56dm

width of the carpet = 70cm

to find:

length = ?

proof:

( 1 dm = 10 cm)

( 56 dm = 56*10 = 560 cm)

perimeter = L * B

560 cm = L + B +L + B

560 = 2L + 2B

560 = 2L + 2*70

560 = 2L + 140

2 L = 560 - 140

2L = 420

L = 420 / 2

L = 210 cm

L = 21 dm

hence proved