A Man rows to a place 63 km far and comes back in 16 hours. He finds that he can row 18 km with the flow in the same time taken to row 14 km against the flow. What is the speed of the stream?

The ratio of the heights of Ram and Rahim is 7 : 8. If Rahim's height is 66 inches, then the height of Ram is?

Direction: Study the following table carefully to answer these questions.

What is the ratio between the total number of students appeared in 2004 and 2005 together from' schools C and D respectively? 

The speed of a bus Excluding stoppages, is 80 kmph and including stoppages, it is 72 kmph. For how many minutes does the bus stop per hour?

The area of a circle is proportional to the square of its radius. A small circle of radius 3 cm is drawn within a larger circle of radius 5 cm. Find the ratio of the difference between the area of the larger circle and that of the smaller circle to the area of the larger circle.

The ratio of officers to soldiers in a regiment before the war was 3 : 31. 6 officers and 22 soldiers were killed in the war and the ratio became 1:13. What was the number of officers in the regiment before the war?

The value of sin²22° + Sin²68°+ Cot² 30° is:

Simplify the following equation.
$$ {(100)}^{1\over2}.{(0.001)}^{1\over3}-{(0.0016)}^{1\over4}.{3}^{0}+({5\over4})^{-1} $$