5. How long does it take to walk 14 2/5 km if the avarage speed is 4,5 km per hour?

6. It took 3 3/5 h for Kadri to paint the wall. Which part of the wall was painted in 1 hour?

7. Ants did 3/5 of the work in 2 h. How long does it take for him to do all the work? How much time does he need for the rest of the work?

8. Kalle got a travel voucher with the price reduction of 80 % and paid 1600 kr for that. What was the full price of the woucher?