A. 4.9 min
B. 5. 28 min
C. 5.5 min
D. 6 min
Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient tha Sakshi. The number of days taken by Tanya to do the same piece of work is
A boat covers a distance of 30km downstream in 2 hour while it takes 6 hour to cover the same distance upstream. What is the speed of the boat in km/hr
A man’s speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr The man’s speed against the current is?
A boy goes to his school form his house at a speed of 3 km/hr and returns at a speed of 2 km/hr. If he takes 5 hours in going and coming, the distance between his house and school is:
P and Q can complete a work in 20 days and 12 days respectively. P alone started the work and Q joined him after 4 days till the completion of the work. How long did the work last?