Answer:
Step-by-step explanation:
4.
Johan completes 6 worksheets in 2 hours and 20 minutes.
6 worksheets ---> 2 hrs 20 minutes
6 worksheets ---> 140 minutes
1 worksheets ----> 140/6 minutes
1 worksheets ----> 23.33 minutes
He finishes 1 worksheet in 23.33 minutes
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5.1
9 litres covers 200 km
1 litres covers (200/9) km
rate: l/km or km/l
5.2
200 km covered by 9 litres
1 km covered by (9/200) litres
rate: l/km