1.

Following figure depicts a park where two opposite sides are parallel and left and right ends are semi-circular in shape. It has a 7m wide track for walkingTwo friends Seema and Meena went to the park. Meena said that area of the track is 4066m2 . Is she right? Explain.

Answer»

Area of track = 120 × 70 + π (35)2 – [120 × 56 + π (28)

 = 120 x 14 + 22/7 [(35)2 - (28)2]

= 1680 + 22/7 x 7 x 63

  = 1680 + 1386

  = 3066m2.

 Yes, Meena is wrong.



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