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 oats. How many packets of cereals were collected?
- The table shows the mass of each packet of food.
Food Items |
Mass of each packet |
Flour |
7 kg |
Oats |
265 g |
Lentils |
490 g |
Cereals |
500 g |
What is the difference between the total mass of lentils collected and the total mass of flour collected? Give your answer in kg.
(a)
Number of packets of oats collected = 1 u
1 u = 30
Total number of packets of food items collected
= 3 u
= 3 x 30
= 90
Number of packets of cereals collected
= 90 - 12 - 30 - 20
= 28
(b)
1 kg = 1000 g
7 kg = 7 x 1000 = 7000
Total mass of flour collected
= 12 x 7000
= 84000 g
Total mass of lentils collected
= 20 x 490
= 9800 g
Difference between the total mass of lentils and the total mass of flour collected
= 84000 - 9800
= 74200 g
1000 g = 1 kg
74200 g = 74200 ÷ 1000 = 74.2 kg
Answer(s): (a) 28; (b) 74.2 kg