The distance between two points A and B is covered in $$ {5{1\over 2}\ hours}$$ at a speed of 50 km/hr. If the speed in increased by 5km/hr, how much time would be saved?

Travelling at 80km/hr, Praveen reaches his destination at a certain time. He covers 3/5th of his journey in 2/5th at the time. At what speed (in km/hr) should he travel to cover the remaining journey, so as to reach his destination on time? 

Pranav rows upstream a distance of 56km in 8 hours and rows downstream a distance of 75 km in 3 hours. How much time he will take to row a distance of 44.8 km in still water?

Vishnu travelled equal distances at speeds of 10 km/hr, 30 km/hr and 8 km/hr and took a total of 15.5 minute to complete. Find the total distance he travelled in km.

Hema takes a total of 9 hours 55 min to walk a certain distance and then cycling back to the same place from where she had started. She could walk both ways in 12 hours 30 min. The time she will take to cycle both ways is:

Vaishnavi and Saurabh start moving at the same time from city A to city B, 60 km away. Vaishnavi travels 4 km/hr slower than Saurabh. Saurabh reaches city B and at once turns back meeting Vaishnavi, 12 km from city B. What is the speed of Vaishnavi ?

Speed of boat in downstream and upstream are 32km/hr and 23km/hr. Find the speed of current ?

A car can finish a certain journey in 10 hours at a speed of 42 kmph. In order to cover the same distance in 7 hours, the speed of the car (km/h) must be increased by: