The bar graph shows the number of packets of different food collected in a donation drive.
- 13 of the total number of packets of food collected was rice. How many packets of tea were collected?
- The table shows the mass of each packet of food.
| Food Items |
Mass of each packet |
| Rice |
3 kg |
| Lentils |
435 g |
| Tea |
310 g |
| Cereals |
500 g |
What is the difference between the total mass of cereals collected and the total mass of lentils collected? Give your answer in kg.
(a)
Number of packets of rice collected = 1 u
1 u = 28
Total number of packets of food items collected
= 3 u
= 3 x 28
= 84
Number of packets of tea collected
= 84 - 28 - 18 - 10
= 28
(b)
Total mass of cereals collected
= 10 x 500
= 5000 g
Total mass of lentils collected
= 18 x 435
= 7830 g
Difference in mass between the total mass of cereals and the total mass of lentils collected
= 7830 - 5000
= 2830 g
1000 g = 1 kg
2830 g = 2830 ÷ 1000 = 2.83 kg
Answer(s): (a) 28; (b) 2.83 kg
