Question

A heap of water in the form of a cone whose diameter is 21cm and height is 6cm .find its volume. the heap is to be covered by canvas to protect it from rain. find the area of the canvas required​

Answer 1

Answer:

126

Step-by-step explanation:

Answer 2

Answer:

we need to find volume of heap

area of the canvas required to cover the heap

Diameter of heap = 21cm

Radius = 10.5cm

height of heap = 6cm

we know that,

Now,

The heap is to be covered by canvas to protect it from rain.

Finding Slant height :-

⇝ l² = r² + h²

⇝ l² = 10.5 × 10.5 + 6 × 6

⇝ l² = 110.25 + 36

⇝ l² = 146.25

⇝ l = √146.25

⇝ l = 12.09

So,

⪼Area of the canvas = 22/7 × 10.5 × 12.09

⪼ Area of the canvas = 22/7 × 126.945

⪼ Area of the canvas = 398.97 cm²

Hence,

Area of canvas required = 398.97cm²

Volume of heap = 693cm³

Step-by-step explanation: