Question

A square and a rectangle have equal area.The rectangle is 64 cm by 81 cm. What is the perimeter of the square?

Answer 1

2592 cm

Explanation:

square area = x²

rectangle area = bh

so

x² = bh

since the areas are equal

b and h are in the problem as 64 and 81

x² = 64x81

x² = 5184

divide by 2

x = 2592 cm