The radius of a cylinder is 5" and the lateral area is 70 sq. in. Find the length of the altitude. 2.8" 7" 14"

1 answer:

algol132 years ago

5 0

The correct question is
The radius of a cylinder is 5" and the lateral area is 70pi sq. in. Find the length of the altitude.

we know that

[surface lateral area]=(2*pi*r)*height
height= [surface lateral area]/(2*pi*r)
surface lateral area=70*pi in²
r=5 in
so
height= [70*pi]/(2*pi*5)------> 7 in

the answer is
7 in

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