Question

50. By melting of a solid cuboid of length 16cm, breadth 11cm, height 1Ocm, how many
solid coins of 0.2cm thick and 2cm diameter can be formed?
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Answer 1

Step-by-step explanation:

$\huge\bold\orange{Answer:-}$

Volume of cuboid = N * volume of solid coins .

The solid coins are of cylindrical shape

$= 16 \times 11 \times 10 {cm}^{3} \\ = 1760 {cm}^{3} \\ \\ \\ no w\: the \: radius \: of \: coin \\ r= \frac{d}{2} = \frac{2}{2} = 1cm$

Let's find the volume now

$volume \: of \: the \: solid \: coins \\ \: \: \: \: \: \: = \pi {r}^{2} h \\ \: \: \: \: \: = 3.14 \times 1 \times 1 \times 0.2 {cm}^{3} \\ \: \: \: \: \: \: \: \: = 0.628 {cm}^{3}$

Now volume of cuboid = N* volume of solid coins

1760 = 0.628 * N

N = 2800