The number of coins 1.5cm in diameter and 0.2 cm thick to be melted to form a right circular Cylinder of height 10 cm and diameter 4.5 cm is?
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As the coins are in the form of thin cylinder
Volume of each coin = π×(0.75)²×0.2 =0.1125π cm³
Volume of melted cylinder = π× (2.25)²× 10 = 50.625π cm³
number of coin required = (volume of melted cylinder)/(volume of each coin)
= 50.625π/0.1125π = 450 coins
kanhaiya6714:
I have made mistakes
But your answer is wrong
answer is given in the book is Rs 800.70
I have asked one more time that question
and this time I have asked that question in math
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