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Question

Area of a rectangle and the area of a circle are equal. If the dimensions of rectangle are 14cm×11cm, then radius of the circle is:
  1. 10.5 cm
  2. 14 cm
  3. 7 cm
  4. 21 cm


Solution

The correct option is C 7 cm
Area of rectangle = l×b
=14 cm × 11 cm
Area of a circle =πr2
Area of rectangle = Area of a circle (given in question)
14 cm × 11 cm = 227×r2
49cm2=r2
 r =7 cm

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