A cylinder pillar is 50 cm in diameter 3.5 m high. Find the cost of white washing its curved surface at the rate of Rs 1.25 per square metre.
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Answer:RS.34.375
Step-by-step explanation:
Curved surface area of cylinder=2πrh
Curved surface area of cylinderical piller=2×22/7×0.50×3.5/2
=2×22/7×50/100×35/20
=2×22×1/2×5/4
=22×5÷4
=110÷4
=27.5 m²
Cost of white washing=27.5×1.25
=RS.34.375
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