Question

The radius of the cross-section of an inflated cycle tyre is 7 cm. The distance of the centre of the cross-section from the axis is 20 cm. Find the volume of the tyre

Answer 1

Solution:-

Volume = Area of the cross section × length
Area of the cross section = πr²
= 22/7*7*7
= 154 sq cm
Length is nothing but the circumference of the center part = 2πr
= 2*22/7*20
length = 880/7 cm
Now, volume of the tyre = Area of cross section × length
= 154 × 880/7
= 19360 cu cm
Answer.