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how many solid coins of 6 CM diameter and 0.2 CM thickness can be made by melting a solid metal cuboid of length 33 centimetre, breadth 18 cm and height 8 cm?
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Length of cuboid = 33cm
Breadth of cuboid = 18cm
Height of cuboid = 8cm
Volume of cuboid = l × b × h
= 33 × 18 × 8
= 4752 cm^3
Area of coin = b × h
Diameter of coin = 6cm
Area of base = pi × r^2
= 22/7 × 6 × 6
=792/7
Height of coin = 0.2 cm
Area of coin = 792/7 × 0.2
=792/7 × 2/10
=1584/70
No. coins can be made = 4752 ÷1584/7
= 4752 × 7/1584
= 3 × 7
= 21
therefore, 21 coins can be made.
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