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Question 07.1.
Suppose 2 kg of sugar contains 9×106 crystals. How many sugar crystals are there in 5 kg of sugar?


Solution

Let the number of sugar crystals in 5 kg of sugar be be x.

Weight of sugar (in kg)25No.of crystals9×106x

Here weight of sugar and number of crystals are in direct proportion.
 29×106=5x x×2=5×9×106 x=5×9×1062 x= 22.5×106=2.25×107

Hence, the number of sugar crystals are 2.25×107

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