The number of coins, each of radius 0.75 cm and thickness 0.2 rightcm, to be melted to make aright circular cylinder of height 8 cm and base radius 3 cm is
Total number of coins = 
= 
= 640
Hence, option D is correct
24
The number of coins, each of radius 0.75 cm and thickness 0.2 rightcm, to be melted to make aright circular cylinder of height 8 cm and base radius 3 cm is
Total number of coins =
=
= 640
Hence, option D is correct