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Maths-

General

Easy

Question

A cone of height 20 yd has a radius 15 yd, find its volume in cubic ft?

127170 cubic ft
172710 cubic ft
712107 cubic ft
4710 cubic ft

hint Hint:

Volume of a cone = (1/3)πr2h
1yd = 3 ft

The correct answer is: 127170 cubic ft

We have given the dimensions of a cone
Radius, r = 15 yd
Height, h =20 yd
We have to find the volume of the given cone
We know that
Volume of a cone = (1/3)πr²h
= (1/3)(3.14)(15 x 15)(20)
= (1/3)(3.14)(75 x 20)
= (3.14)(1500)
= 4710 yd³
The volume of cone = 4710 yd³
1 yd = 3 ft
1 yd³ = 27 ft³
The volume of cone = 4710 x 27 = 127170 ft³
Therefore correct option is a) 127170 ft³ .

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