Question

how many silver coins of diameter 5cm and thickness 4mm have to be melted to prepare a cubiod of 12cm X11cm X5cm dimenssion?​

Answer 1

Answer:22 coins need to be melted

Step-by-step explanation:

Volume of cuboid=n*Volume of one coin

12*11*5=n*π*5/2*5/2*4/10

60*11*4/25=n*π*4/10

660*4*10/25*4=n*π

6600/25*7/22=n

264*7/22=n

n=22

Hope it helps....