Question

be fille
How many silver coins, 1.75 cm in diameter and of thickness 2 mm, must be melted to form
a cuboid of dimensions 5.5 cm x 10 cm x 3.5 cm?​

Answer 1

Let the number of coin be x

x× volume of 1 coin = volume of box

x×πr

2

h=l×b×h

x×

7

22

×

100×2

175

×

100×2

175

×

10

2= 1055×10× 1035

x= 22×25×175

55×35×100×100×2

=20×20

=400coins