Study the graph and answer the question given below:
The below line graph shows the distance travelled by both driver A and driver B at different time intervals.
NOTE: Driver A and Driver B both start driving at 08:00. (this means for driver A at the end of 09:00 the distance travelled by driver A is 50 km)
Find the ratio of the average speed of driver A from 10:00 to 12:00 of travelling and the average speed of driver B from 13:00 to 15:00 of travelling.
1
4 : 3
2
3 : 4
3
2 : 1
4
1 : 2