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Suppose 2kg of sugar contains $9 \times 10^{6}$ crystals.
How many sugar crystals are therein:(i) 5 kg of sugar? (ii) 1.2 kg of sugar?
Given: 2kg of sugar contains $9 \times 10^{6}$
To Do : Find how many crystal of sugar in 5kg and 1.2 kg
Solution:
Given number of crystals in 2 kg sugar=$9 \times 10^{6}$
So, number of crystals in 1 kg sugar =$\frac{9}{2}\times10^6$
= $4.5 \times10^6$
= $4.5 \times10^6$
(i) Number of crystals in 1 kg sugar = 4.5 x 10
Therefore, number of crystals in 5 kg of sugar = $5 \times 4.5\times10^6$
= $22.5 \times10^6$
(ii) Number of crystals in 1 kg sugar =$ 4.5\times10^6$
Therefore, number of crystals in 1.2 kg of sugar = $1.2 \times 4.5 \times10^6$
= $5.4 \times10^6$
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