The bar graph shows the number of packets of different food collected in a donation drive.
- 16 of the total number of packets of food collected was tea. How many packets of cereals were collected?
- The table shows the mass of each packet of food.
Food Items |
Mass of each packet |
Rice |
6 kg |
Tea |
345 g |
Biscuits |
470 g |
Cereals |
300 g |
What is the difference between the total mass of biscuits collected and the total mass of rice collected? Give your answer in kg.
(a)
Number of packets of tea collected = 1 u
1 u = 12
Total number of packets of food items collected
= 6 u
= 6 x 12
= 72
Number of packets of cereals collected
= 72 - 24 - 12 - 14
= 22
(b)
1 kg = 1000 g
6 kg = 6 x 1000 = 6000
Total mass of rice collected
= 24 x 6000
= 144000 g
Total mass of biscuits collected
= 14 x 470
= 6580 g
Difference between the total mass of biscuits and the total mass of rice collected
= 144000 - 6580
= 137420 g
1000 g = 1 kg
137420 g = 137420 ÷ 1000 = 137.42 kg
Answer(s): (a) 22; (b) 137.42 kg