Q.

How many coins are there in a sack of 5 rupee coins if it weighs 18 kg, if one coin weighs 9g?

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a

2000

b

1000

c

3000

d

NONE

answer is B.

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Detailed Solution

Weight of a 5 rupee coin = 9 g Weight of the sack of 5 rupee coins = 18 kg 

 We know, 1 kg = 1000 g 

Weight of 18 kg sack in grams

 = 18× 1000

 = 18000 g 

 Number of 5 rupee coins in 18 kg sack 

= 18000 ÷ 9 = 2000 coins

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