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 |
9 kg |
Cereals |
300 g |
Coffee |
450 g |
Lentils |
300 g |
What is the difference between the total mass of coffee collected and the total mass of rice collected? Give your answer in kg.
(a)
Number of packets of cereals collected = 1 u
1 u = 18
Total number of packets of food items collected
= 5 u
= 5 x 18
= 90
Number of packets of lentils collected
= 90 - 14 - 18 - 40
= 18
(b)
1 kg = 1000 g
9 kg = 9 x 1000 = 9000
Total mass of rice collected
= 14 x 9000
= 126000 g
Total mass of coffee collected
= 40 x 450
= 18000 g
Difference between the total mass of coffee and the total mass of rice collected
= 126000 - 18000
= 108000 g
1000 g = 1 kg
108000 g = 108000 ÷ 1000 = 108 kg
Answer(s): (a) 18; (b) 108 kg