if the side of a square be increased by 4 cms. The area increased by 60 sq. cms . The side of the square is?
12 cmNone of these14cm13 cm
Let each side = x cmThen, (x + 4 )2 - x2 = 60? x 2 + 8x + 16 - x2 = 60? x = 5.5 cm