Question

The cost of painting the total surface of a closed cylinder at Rs 5 per sq cm is Rs 4620 . If the height of the cylinder is 2 times the radius ,the radius is



a)7cm

b)14cm

c)21cm

d)28cm

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Answer 1

Answer:

c is the current answer

please mark it brainllist

Answer 2

Step-by-step explanation:

total surface area=4620/5=924

total surface area of cylinder=2πrh

2πr2r=924

4r²π=924

r²=73.6

r=8.58