(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
