Question

The side of a square is x cm and that of another is 2x cm. Their combined area is 20 square
centimetres. Find the lengths of the sides of each square.
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Answer 1

Answer:

The lengths of the sides are 4cm and 8 cm.

Step-by-step explanation:

x^2+(2x)^2 = 20

x^2+4x^2 = 20

5x^2 = 20

x^2 = 20/5 = 4

x = √4 = 2

x=4 and 2x=8

Answer 2

Answer:

side of square = 2 cm and

side of second square = 4 cm.

Step-by-step explanation:

x^2+4x^2 = 20 sq. cm.

or, 5x^2 = 20 sq. cm.

or, x^2= 20/5 sq. cm.

= 4 sq. cm.

or, x = √4 cm = 2 cm. ans1.

and, 2x = 2*2 cm. = 4 cm. ans2.