Five similar small rollers each having radius 7 cm and length as 10 cm are to be painted at a rate of Rs.10 / cm2. What will be the total cost of painting (in Rs.)?

Five similar small rollers each having radius 7 cm and length as 10 cm are to be painted at a rate of Rs.10 / cm2. What will be the total cost of painting (in Rs.)? Correct Answer 22000

Given, No. = 5, r = 7 cm, l = 10 cm, rate = Rs. 10 / cm2 Cost of painting = 2πrl * No. * rate = 2 * (22 / 7) * 7 * 10 * 5 * 10 = Rs. 22000
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