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 cereals. How many packets of noodles were collected?
- The table shows the mass of each packet of food.
Food Items |
Mass of each packet |
Rice |
3 kg |
Cereals |
360 g |
Coffee |
465 g |
Noodles |
200 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 = 38
Total number of packets of food items collected
= 3 u
= 3 x 38
= 114
Number of packets of noodles collected
= 114 - 24 - 38 - 26
= 26
(b)
1 kg = 1000 g
3 kg = 3 x 1000 = 3000
Total mass of rice collected
= 24 x 3000
= 72000 g
Total mass of coffee collected
= 26 x 465
= 12090 g
Difference between the total mass of coffee and the total mass of rice collected
= 72000 - 12090
= 59910 g
1000 g = 1 kg
59910 g = 59910 ÷ 1000 = 59.91 kg
Answer(s): (a) 26; (b) 59.91 kg