Question

4. Find the number of coins of 1.5 cm diameter and 0.2 cm thickness to be melted to form a
right circular cylinder of height 10 cm and diameter 4.5 cm.​

Answer 1

Answer:

450

Step-by-step explanation:

Let nnv the number of 1.5 CM diameter coin required to form a cylinder circular cylinder of height 10 cm and diameter 4.5 CM .

volume aap right circular cylinder =n× volume of 1.55 CM diameter coins .

therefore

n =

$n = \pi(4.5 \div 2) {}^{2} \times 10 \\ \div \\ \pi(1.5 \div 2) {}^{2} \times 2 \div 10 \\ \\ \\ 45 \times 45 \div 20 \times 20 \times 10 \times 20 \times 20 \times 10 \div 15 \times 15 \times 2 \\ \\ \\ \\ \\ \\ \\ 9 \times 10 \times 5 \\ \\ \\ 450$