Question

Find the cost of making a hollow tin cylinder of height 15 cm and radius 7 cm at Re 1 per 100 sq. cm.​

Answer 1

Answer:

COST OF MAKING IT IS RS 6.6

Step-by-step explanation:

$csa \: of \: cylinder = 2\pi \times rh \\ \\ = 2 \times \frac{22}{7} \times 7 \times 15 \\ \\ = 44 \times 15 \\ \\ = 22 \times 30 \\ \\ = 660 \: square \: cms. \\ \\ cost = 660 \times \frac{1}{100} \\ \\ = rupees \: \: \: 6.6$