A heap of wheat is in the form of a cone whose diameter is 10.5 m and height is 3 m. Find its volume. The heap is to be covered by canvas to protect it from rain. Find the area of the canvas required.<p></p>

Given:⇒Diameter=10.5m⇒radius=r=5.25m⇒height=3m⇒volume=1/3πr2h⇒Volume=(1/3×22/7×5.25×5.25×3)m3⇒Volume=86.625m3For slant height:⇒l2=h2+r2=32+(5.25)2=9+27.5625=36.5625⇒l=6.0467m(approx)Canvas needed to protect wheat from rainTherefore, curved surface area=πrl=(22/7×5.25×6.0467)m2=99.77m2(approx)

Eduprobe

Question:

A heap of wheat is in the form of a cone whose diameter is 10.5 m and height is 3 m. Find its volume. The heap is to be covered by canvas to protect it from rain. Find the area of the canvas required.

Solution: