The curved surface area of cylinder is 440 sq.cm. The height of cylinder is 3 more than the radius of cylinder. The radius of cylinder is equal to the radius of circle. Find the circumference of a circle.
1. 44cm
2. 50cm
3. 88cm
4. 28cm
5. 56cm
1. 44cm
2. 50cm
3. 88cm
4. 28cm
5. 56cm
Correct Answer – Option 1 : 44cm
Given:
⇒ Curved surface area of cylinder = 440
⇒ 440 = 2πrh
Then,
⇒ h = r + 3
Solving,
⇒ h = 10cm and r = 7cm
⇒ Radius of circle = 7cm
⇒ Circumference of a circle = 2π × radius
= 2 × 22/7 × 7
= 44 cm
∴ Circumference of a circle is 44cm.