Two-body motion and economics problems
Answers are for parents and teachers.
1
Two motorcyclists leave one place in opposite directions at 40 and 50 km/h for 4 hours. How many km apart are they?
360
2
Walkers leave two villages 54 km apart at 4 and 5 km/h, towards each other. After how many hours do they meet?
6
3
The gap is 36 km; a cyclist at 18 km/h chases a pedestrian at 6 km/h going the same way. After how many hours does he catch up?
3
4
1 kg costs 12 500 so‘m. How much do 4 kg cost?
50000
5
56 000 so‘m was paid for 7 kg of grapes. What is the price of 1 kg?
8000