Answers

2014-11-13T21:24:07+08:00
Perimeter of a rectangle by formula is P=2L + 2W
Given that the perimeter is 98cm, then you'll have it as:
98 = 2L + 2W
Divide the whole equation with 2
49 = L + W   -----equation 1
Since the length is 5 less than 5 times the width, then
L = 5W - 5   ----equation 2
Substitute equation 2 to equation 1
49 = L + W
49 = 5W - 5 + W
49 + 5 = 5W + W
54 = 6W
W = 9cm
Substitute W=9cm to equation 2
L = 5W - 5
L = 5(9) - 5
L = 40cm
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2014-11-13T21:26:06+08:00