Answer:
1. 55 laps ÷ 20 minutes = 2.75 laps/minutes
2.75 laps/minutes × 12 minutes
= 33 laps
2. P2,400 ÷ 5 boxes = P480/box
P480/box × 9 boxes
= P4,320
3. 20 men × 4 days = 80 men/day
80 men/day ÷ 8 men
= 10 days
4. 4:8
sum of ratio: 12
60 ÷ 12 = 5
4 × 5 = 20
8 × 5 = 40
= the numbers are 20 and 40
5. 3 pupils with the ratio of 6:4:2
360 pens
sum of ratio = 12
360 ÷ 12 = 30
6 × 30 = 180
4 × 30 = 120
2 × 30 = 60
the first pupil receive 180 pens, second pupil receive 120 pens, while the third pupil receive 60 pens.
