Question

A pack of 2 kg of sugar contains $8\times {10}^6$ crystals and a sack contains 3 packs of sugar. In 12 sacks, what will be the number of sugar crystals present?

• A. $2.88\times {10}^8$
• B. $2.88\times {10}^6$
• C. $7.2\times {10}^8$
• D. $7.2\times {10}^6$

Answer 1

The correct option is A $2.88\times {10}^8$

A pack of sugar weighs 2 kg.
Now, a sack has 3 packs of sugar, which will be 3 x 2 = 6 kg
In 12 sacks, the weight of sugar will be 6 x 12 = 72 kg

Number of crystals in 1 kg sugar
= $8\times {10}^6÷2$ = $4\times {10}^6$
Number of crystals in 72 kg sugar = $4\times {10}^6\times 72$
= $288\times {10}^6$
= $2.88\times {10}^8$