Question

A metal cuboid of measures 16cm x 11cm x 10cm was melted to make coins. How many coins were made, if the thickness and diameter of each coin was 2 mm and 2cm respectively? ( π = 3.14 )​

Answer 1

Answer:

As the coin has cylindrical shape . So, the number of coins were made is 2802.

Step-by-step explanation:

Answer 2

Step-by-step explanation:

$vol \: of \: cuboid = lxbxh \: = 16 \times 11 \times 10 = 1760cm {}^{3}$

$d = 2cm \\ r = 2 \div 2 = 1cm \\ h = 2mm \\ vol \: of \: coin = 2\pi \times r \times h = 2 \times 3.14 \times 1 \times 2 \\ = 12.56cm {}^{3}$

$no \: of \: coins = \frac{1760}{12.56} = 140.12 \\ = 140coins \: approx.$

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