29. A car travels 20 kilometers per hour faster than a second car. The first car covers 180 kilometers in
the
same time the second car covers 135 kilometers. What is the average speed of each car?
a. 20kph , 40 kph b. 40 kph , 60 kph
c. 60 kph , 80 kph d. 80 kph , 100 kph​