(i) Let the number of sugar crystals in 5 kg of sugar be x. The given information in the form of a table is as follows.
Amount of sugar (in kg) |
2 |
5 |
Number of crystals |
9 x 106 |
x |
The amount of sugar and the number of crystals it contains are directly proportional to each other. Therefore, we obtain
Hence, the number of sugar crystals is 2.25 × 107.
(ii) Let the number of sugar crystals in 1.2 kg of sugar be y. The given information in the form of a table is as follows.
Amount of sugar (in kg) |
2 |
1.2 |
Number of crystals |
9 x106 |
y |
Hence, the number of sugar crystals is 5.4 x 106