Question

How many silver coins 1.75 cm in diameter and of thickness 2 mm to form vuboidal dimension of 11*10*7?

Answer 1

h = 2 mm = 0.2 cm r = 1.75/2cm = 0.875cm
let n be no of coins
vol of cylinder × n = vol of cuboid
πr^2h × n = 11 × 10 × 7
22/7 × (0.875)^2 × 0.2 × n = 11 × 10 × 7
n = 11 × 10 × 7 × 7 / 22 × 0.2 × 0.875 × 0.875
n = 1600 ( after solving it )

hope you understand it!!!!!