A right circular cone of largest volume is cut out from a solid wooden hemisphere. The remaining material is what percentage of the volume of the original hemisphere?

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

If the circumcenter of the triangle lies outside it, then the triangle is 

Speed of train B is 20% more than speed of train A and length of train A and B is 720 meters and 600 meters respectively. If both trains running in opposite direction cross each other in 24 second, then find speed of trains B (in km/hr)?

If u : v= 4 : 7 ,  v : w = 9 : 7 and u=72 then find the value of w.

Directions: Find the wrong number in the following number series:

0.5, 2, 1, 4, 32, 512, 16384

In △PQR, ∠P = 90°. S and T are the mid points of sides PR and PQ, respectively. What is the value of RQ²/(QS²+ RT²)?

Directions :- Refer the graph and answer the given questions.
 The following line graph shows the number of products sold by company A and B during six years.

The number of products sold by B increased by what percent from 2011 and 2014 ?