Question

The ratio of the lengths of 3 squares of different sizes is 2:4:7. If the length of the biggest

square is 10 cm longer than the smallest square, find the perimeter of the smallest square.

Answer 1

9514 1404 393

Answer:

16

Explanation:

The largest square is 7-2 = 5 ratio units larger than the smaller square. Hence, each ratio unit stands for (10 cm)/5 = 2 cm. The side length of the smaller square is 2(2 cm) = 4 cm. The perimeter is 4 times that: 16 cm.

The perimeter of the smallest square is 16 cm.