The bar graph shows the number of packets of different food collected in a donation drive.
- 15 of the total number of packets of food collected was cereals. How many packets of lentils were collected?
- The table shows the mass of each packet of food.
| Food Items |
Mass of each packet |
| Rice |
7 kg |
| Cereals |
370 g |
| Dried Nuts |
290 g |
| Lentils |
200 g |
What is the difference between the total mass of dried nuts collected and the total mass of rice collected? Give your answer in kg.
(a)
Number of packets of cereals collected = 1 u
1 u = 12
Total number of packets of food items collected
= 5 u
= 5 x 12
= 60
Number of packets of lentils collected
= 60 - 20 - 12 - 16
= 12
(b)
1 kg = 1000 g
7 kg = 7 x 1000 = 7000
Total mass of rice collected
= 20 x 7000
= 140000 g
Total mass of dried nuts collected
= 16 x 290
= 4640 g
Difference between the total mass of dried nuts and the total mass of rice collected
= 140000 - 4640
= 135360 g
1000 g = 1 kg
135360 g = 135360 ÷ 1000 = 135.36 kg
Answer(s): (a) 12; (b) 135.36 kg
