Find the length of the side of a square whose area is 441 m²?

Let the length of side of a square be x meter.
Area of square = (side)² = x²=441
⇒ x=√441 = √3x3x7x7 = 3×7
⇒ x = 21m
Hence, the length of side of a square is 21 m.

Class 8 Maths Chapter 6 Exercise 6.4 Solution in Video

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