how many coin shaped solids of 1cm radius and 0.2 cm thickness can be made by melting a solid metal brick of length 16cm width 11cm and height 10 cm?
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volume of metal brick = l× b× h=16× 11 × 10= 1760 m cube
now, volume of 1 coin = πr sq. hhere r= 1cm and h=0.2 cmtaking π =3.14 volume of coin = 3.14× 1× 0.2= 0.628 cm
no. of coins = volume of metal brick/volume of one coin= 1760/0.628= 2803 (approximate)
now, volume of 1 coin = πr sq. hhere r= 1cm and h=0.2 cmtaking π =3.14 volume of coin = 3.14× 1× 0.2= 0.628 cm
no. of coins = volume of metal brick/volume of one coin= 1760/0.628= 2803 (approximate)
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