Applications of proportion and scale
Answers are for parents and teachers.
1
9 kg of apples cost 54,000 soms. How many soms do 14 kg cost?
84000
2
12 workers do a job in 5 days. How many days do 15 workers need?
4
3
Divide 90 in the ratio 2 : 7. Find the larger share.
70
4
Scale 1 : 20,000. A 7 cm distance on the map is how many metres in reality?
1400
5
Why does 1 cm stand for 1 km at scale 1 : 100,000?
1 km = 100,000 cm, and the drawing takes 1/100,000 of it, i.e. 1 cm.