The bar graph shows the number of packets of different food collected in a donation drive.
- 14 of the total number of packets of food collected was coffee. How many packets of noodles were collected?
- The table shows the mass of each packet of food.
| Food Items |
Mass of each packet |
| Rice |
2 kg |
| Coffee |
315 g |
| Lentils |
425 g |
| Noodles |
400 g |
What is the difference between the total mass of lentils collected and the total mass of rice collected? Give your answer in kg.
(a)
Number of packets of coffee collected = 1 u
1 u = 24
Total number of packets of food items collected
= 4 u
= 4 x 24
= 96
Number of packets of noodles collected
= 96 - 16 - 24 - 28
= 28
(b)
1 kg = 1000 g
2 kg = 2 x 1000 = 2000
Total mass of rice collected
= 16 x 2000
= 32000 g
Total mass of lentils collected
= 28 x 425
= 11900 g
Difference between the total mass of lentils and the total mass of rice collected
= 32000 - 11900
= 20100 g
1000 g = 1 kg
20100 g = 20100 ÷ 1000 = 20.1 kg
Answer(s): (a) 28; (b) 20.1 kg
