On which day the bus was most crowded?
Sabu got into the bus at 6 o’clock. Usually the bus travels at an average speed of 30 km/hr and reaches the railway station at ten. But that day, it was raining and it could manage only an average speed of 20 km/hr. Sabu got down from the bus at eight and caught a car. He reached the station at ten itself. What was the average speed of the car?