Problema Solution
Suppose a water tank in the shape of a right circular cylinder is thirty feet long and eight feet in diameter. How much sheet metal was used in its construction?
Answer provided by our tutors
for cylinderical tank
h =30 feet ,r = 8/2 = 4 feet
metal sheet used = total surface area of cylinder
= 2 x3.14xr ( r + h )
=2x3.14x4x (4 + 30 )
= 2 x 3.14 x 4 x 34
= 854.08 square feet