Question

How many coin shaped of radius of 1 cm and thickness 0.2 cm can be made by melting a iron brick of lenth 16 cm ,width 11 cm ,height 10 cm

Answer 1

*First we will find the volume of a coin

=

$\pi \times r {2} \times h$

(As the coin is usually cylindrical in shape)

*Volume of coin=3.14×1×1×0.2

=0.628cc

*Now we will find the volume of cubiodal brick=length×breadth×height

= 16×11×10

=1760cc

*No. Of coins be made=Volume of coin/ Volume of brick

= 1760/0.628

= 2802.55coins