Question

A cylindrical piller has a diameter of 56 cm and is of 35 m high. There are 16 pillars around the building. Find the cost of painting the curved surface area of all the pillars at the rate of R.5.50 per 1 m².

Answer 1

Step-by-step explanation:

Given

$2r = 56cm = .56m \\ h = 35 \\ no \: of \: pillers = 16 \\ area \: of \: curved \: surface \\ \\ = 2\pi \times rh \\ = \frac{22}{7} \times .56 \times 35 \times 16 \\ = 985.6 {m}^{2} \\ \\ now \: at \: the \: rate \: of \: 5.50 \: per {m}^{2} \\ = 985.6 \times 5.50 \\ = 5420.8$