Question

1. How many solid coins of diameter 6 cm and thickness 0.2 cm can be made by
melting a solid metal cuboid of length 33 cm, breath 18 cm and height 8 cm?​

Answer 1

Answer:

840

Step-by-step explanation:

volume of cuboid = l × b × h

= 33 × 18 × 8

volume of cylinder (coin) = πr^2h

= 22/7 × 3 × 3 × 0.2

number of coins = volume of cuboid/volume of cylinder

$x = \frac{33 \times 18 \times 8}{ \frac{22}{7} \times 3 \times 3 \times 0.2} \\ x = \frac{33 \times 18 \times 8 \times 7}{22 \times 3 \times 3 \times 0.2} \\ x = \frac{11 \times 6 \times 8 \times 7}{22 \times 0.2} \\ x = \frac{6 \times 4 \times 7}{0.2} \\ x = 6 \times 20 \times 7 \\ x = 6 \times 140 \\ x = 840$

840 coins can be made by melting the cuboid

hope you get your answer