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 rice were collected?
- The table shows the mass of each packet of food.
Food Items |
Mass of each packet |
Rice |
9 kg |
Biscuits |
360 g |
Cereals |
400 g |
Noodles |
300 g |
What is the difference between the total mass of biscuits collected and the total mass of noodles collected? Give your answer in kg.
(a)
Number of packets of cereals collected= 1 u
1 u = 34
Total number of packets of food items collected
= 3 u
= 3 x 34
= 102
Number of packets of rice collected
= 102 - 10 - 34 - 36
= 22
(b)
Total mass of biscuits collected
= 10 x 360
= 3600 g
Total mass of noodles collected
= 36 x 300
= 10800 g
Difference between the total mass of biscuits and the total mass of noodles collected
= 10800 - 3600
= 7200 g
1000 g = 1 kg
7200 g = 7200 ÷ 1000 = 7.2 kg
Answer(s): (a) 22; (b) 7.2 kg