Determine 8134

The perimeter of the rectangle that can be divided into three squares is 168 cm. Determine the lengths of its sides.

Correct answer:

a =  63 cm
b =  21 cm

Step-by-step explanation:


2(a+b) = 168
a = 3b

2·(a+b) = 168
a = 3·b

2a+2b = 168
a-3b = 0

Row 2 - 1/2 · Row 1 → Row 2
2a+2b = 168
-4b = -84


b = -84/-4 = 21
a = 168-2b/2 = 168-2 · 21/2 = 63

a = 63
b = 21

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