CAT
Exam
Find the number of coins, 1.5 cm 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.
(1) 425 (2) 450
(3) 550 (4) None of these.
Read Solution (Total 2)
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- 450 coins
vol of one coin = pi*((1.5)^2 )*0.2/4
vol of cylinder = Pi*((4.5)^2)*10/4
no of coins to be melted = vol of cylinder/vol of each coin = ((4.5/1.5)^2)*10/0.2 = 9*50 = 450 coins - 12 years agoHelpfull: Yes(9) No(2)
- No of coins to b melted = (pi(2.25^2)10)/(pi(.75^2)0.2)
- 9 years agoHelpfull: Yes(1) No(1)
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