how many coins 7 cm in diameter and thickness 1 centimetre must be melted to form a cuboid of dimensions 80 CM X 15.4 CM x 10 cm
Answers
Answered by
5
Answer:
320 coins should be melted
Step-by-step explanation:
A coin is 7cm diameter {radius is 7/2 cm} and 1cm thick
so, its volume is πr^2h
= 22/7 * 7/2 * 7/2 * 1
= 38.5 cm^3
Now the volume of cuboid is
80 * 15.4 * 10 = 12320 cm^3
Volume of Cuboid
Number of coins = ----------------------------
Volume of each coin
= 12320/38.5
Number of coins = 320 ✌✌
Answered by
1
Answer:
320
Step-by-step explanation:
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