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primary 6 | Maths
| Percentage
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Date Posted: 4 years ago
Views: 386
Mass of all boxes = 20kg x 10 = 200kg
Equal number of red and blue boxes, so there are 5 of each.
Since average mass of red box is 30kg,
Mass of the 5 red boxes = 30kg x 5 = 150kg
Mass of the 5 blue boxes = 200kg - 150kg
= 50kg
Average mass of 1 blue box
= 50kg ÷ 5
= 10kg
First one : False
Second one : True
Equal number of red and blue boxes, so there are 5 of each.
Since average mass of red box is 30kg,
Mass of the 5 red boxes = 30kg x 5 = 150kg
Mass of the 5 blue boxes = 200kg - 150kg
= 50kg
Average mass of 1 blue box
= 50kg ÷ 5
= 10kg
First one : False
Second one : True
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