Multiple choice

The length of a rectangle is 15 cm. which is 6 cm. less than the diameter of a circle. What is the area of circle?

  1. 346.5 sq.cm

  2. 173.25 sq.cm.

  3. 156 sq.cm.

  4. 132 sq.cm.

  5. None of these

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Length of rectangle = 15cm. This is 6cm less than circle's diameter, so diameter = 15 + 6 = 21cm. Radius = 10.5cm. Area = πr² = (22/7) × 10.5² = (22/7) × 110.25 = 22 × 15.75 = 346.5 sq.cm. The distractor 173.25 comes from using radius = 10.5 instead of squaring it properly.