Question

an open top cylindrical container has radius 10 cm and height 30 cm find the cost of painting 20 such cylindrical containers from outside at rupees 105 per metre square.


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Answer 1

Answer:

396 is. correct answer

Step-by-step explanation:

c.s.a.= 2πrh

=2×22/7×10×30

=1885.71cm²

area panting 20 cylinder container= 20×1885.71 =37714.28cm²

cost of painting = Rs 396.000001

Answer 2

Step-by-step explanation:

curved surface area =2×22/7×10×30=1885.7cm²

curved surface area of 20 cylinder=1885.7×20=37714cm²

cost =377.14×105=35599.7 ruppes