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 tea. How many packets of coffee were collected?
- The table shows the mass of each packet of food.
Food Items |
Mass of each packet |
Rice |
9 kg |
Tea |
345 g |
Cereals |
320 g |
Coffee |
200 g |
What is the difference between the total mass of cereals collected and the total mass of rice collected? Give your answer in kg.
(a)
Number of packets of tea collected = 1 u
1 u = 14
Total number of packets of food items collected
= 5 u
= 5 x 14
= 70
Number of packets of coffee collected
= 70 - 18 - 14 - 20
= 18
(b)
1 kg = 1000 g
9 kg = 9 x 1000 = 9000
Total mass of rice collected
= 18 x 9000
= 162000 g
Total mass of cereals collected
= 20 x 320
= 6400 g
Difference between the total mass of cereals and the total mass of rice collected
= 162000 - 6400
= 155600 g
1000 g = 1 kg
155600 g = 155600 ÷ 1000 = 155.6 kg
Answer(s): (a) 18; (b) 155.6 kg