Question

the width of a rectangle is 7cm less than its length.if its perimeter is 50 cm,calculate its dimensions.

Answer 1

w=l-7
P=50
P=2l +2w =2l + 2(l-7) =2l +2l -14 = 4l-14
30=4l-14
44=4l
l=11
w=11-7=4
w=4
l=11
P=22+8=30

Answer 2

sorry i have considered the perimeter 30

Answer 3

but the same you need to do for 50 too

Answer 4

50=4l-14
64=4l
l=64/4 =16
l=16
w=16-7=9

l=16
w=9
P=32+18=50