Length of a diagonal of a square is 15√2 cm. Find its perimeter.
(A) 15 cm
(B) 30 cm
(C) 45 cm
(D) 60 cm
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Diagonal of square = a√2
a√2 = 15√2 cm
a = 15 cm
Perimeter of square = 4a
= 4 × 15 cm = 60 cm
Perimeter of square = 60 cm
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