The area of a circle is 1386 cm3. What is the radius of the circle? [Use pi = 22/7 ]
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 21 cm.
The area of circle = (π) × radius2
⇒ 1386 = (22/7) × radius2
⇒ (1386 × 7)/22 = radius2
⇒ 441 = radius2
⇒ radius = 21 cm