1.

Find the length of a side of a square, whose area is equal to the area of a rectangle with sides 240 m and 70 m.

Answer»

According to the question, 

Area of square = Area of rectangle

side2 = 240 x 70

side = \(\sqrt{240\times70}\)

 = \(\sqrt{10\times10\times2\times2\times2\times3\times7}\)

 = \(20\sqrt{42}\)

= 20 x 6.48

= 129.69 m



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