30 coins are placed one upon the another and their total thickness is recorded by a half meter scale. The thickness is found to be 6cm. Find the thickness of each coin in mm.
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Explanation:
total thickness of 30 coins =6cm=60mm
now thickness of 1 coin=60/30=2mm
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2mm
total number of coins=30
thickness of all the coins =60cm ( 1cm=10mm,6×10)
thickness of one coin =60÷30=2mm
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