A tin of paint covers a surface area of 70m2. Each tin costs £4.30.
The entire surface of a solid cylindrical rod with diameter 7m and height 11m needs to be
painted.
Find the minimum cost of painting the rod.​

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Step-by-step explanation:

ts £4.30.

The entire surface of a solid cylindrical rod with diameter 7m and

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

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