The speed of the current is 5 km / hour. A motorboat goes 10 km upstream and back again to the starting point in 50 minutes. The speed (in km / hour) of the motorboat in still water is: 

A runner starts running from a point at 6:00 am with a speed of 8km / hr. Another racer starts from the same point at 8:30 am in the same direction with a speed of 10km / hr. At what time of the day (in P.M.) will the second racer will overtake the other runner? 

In a 100 m race, Kamal defeats Bimal by 5 seconds. If the speed of Kamal is 18 kmph, then the speed of Bimal is 

A can give 40 meters start to B and 70 meters to C in a race of one kilometer how many meters start can B give to C in a race of one kilometer? 

The following penalty diagram shows the 4 year exam results of the students of 10th standard. Study the diagram and answer the following questions.

State the percentage increase in the first division in the year 2003 as compared to the year 2002:

The following penalty diagram shows the 4 year exam results of the students of 10th standard. Study the diagram and answer the following questions.

Name the number of students who appeared in the 10th standard examination in the year 2002-

The following penalty diagram shows the 4 year exam results of the students of 10th standard. Study the diagram and answer the following questions.

What is the ratio of the total students who have attained second division in the year 2000 and appeared in the examination?

If D and E are the mid-points of the side AB and AC respectively of the ∆ABC in the figure given here, the shaded region of the triangle is what percent of the whole triangular region?