Question

how many solid coins of 6cm diameter and 0.2cmthickness can be made by melting a solid metal cuboid of length 33cm ,breadth18cm,heigth8cm

Answer 1

Hi Dear !
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Cuboid :  length   = 33 cm
               Breadth  = 18 cm 
                height    =  8 cm 
volume of cuboid = 33 X 18 X 8 = 4752 cm3

Coin   :      Radius = 3.0cm 
                  height  = 0.2cm
Volume of coin     = pi x  3 x 3 x 0.2 
                               = 5.65 cm3
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Volume of cuboid /volume of coin = No of coins 
4752/5.65 = 841.0