Question

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

Answer 1

Answer:

Let the number of coin be x

x× volume of 1 coin = volume of box

x×πr²h=l×b×h

x* 22/7* 175/2*100 * 2/10=55/10*10*35/10

x= 55*34*100*100*2/22*25*175

=20*20

= 400 coins

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