Time and Distance with Explanation

Q15. Mohan travels from A to B at a rate of 40 km/hr and returns by increasing his speed by 50%. What is the average speed for both the trips?

A. 45 km/hr B. 48 km/hr
C. 50 km/hr D. 30 km/hr

Q16. The speed of a bike increase by 2 km after every 1 hour. If the distance travel in the first hour was 35 km, find the total distance traveled in 12 hours?

A. 500 km B. 525 km
C. 550 km D. 552 km