A cylindrical water tank has an external radius of m and a height of m

MATHEMATICS · Single correct · CBSE · Mathematics · Surface Areas and Volumes · Surface Areas and Volumes

Problem

A cylindrical water tank has an external radius of

4

m and a height of

6

m. Its outside is to be painted excluding the top base. If the cost of painting is Rs

75

per m

^{2}

, find the total cost of painting the tank. (Take

\pi=\dfrac{22}{7}

.) (a) Rs\ 18\,857 (b) Rs\ 15\,086 (c) Rs\ 11\,314 (d) Rs\ 15\,072