**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 |