DRDO Multi tasking staff Model paper 6

Diagonal of square = √2 × (side)
Area of square =(side)2
Given,
Diagonal = 15 cm
⇒ √2 × (side) = 15 cm
⇒ side = (15/√ 2) cm
∴ Area of the square
= (15/√ 2)‌2 cm2
= (225/2) cm2
= 112.5 cm2