Question 6
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
According to question,
x2=441⇒x=√441=√3×3×7×7=3×7 (By prime factorization)⇒x=21m
Hence, the length of side of a square is 21m.