Question

A tin has 20 pastries.The total weight of tin and pastries is 1kg 750g.If each pastry weighs 50 grams,find the weight of the empty tin.

Answer 1

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Weight of tin and pastries -
= 1 kg 750 g
= In g = 1 X 1000 + 750
= 1000 + 750 = 1750 g

Weight of 1 pastrie = 50 g
Weight of 20 pastries = 50 X 20 = 1000 g

Weight of tin box
= Weight of tin and pastries - Weight of all pastries
= 1750 g - 1000 g = 750 g


hence, weight of Tin box = 750 g


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Answer 2

no. of pastries = 50

weight of one pastry = 50g=0.050kg

weight of 20 pasteries = 20 X 0.050 = 1 kg

total weight = 1.750kg

weight of tin = 1.750kg - 1kg

                     = 0.750kg

                     = 750grams