30 persons can do a piece of work in 24 days. How many more people are required to complete the work in 20 days?

Present age of Ram and Shyam are in the ratio of 4: 5 respectively. Five year hence the ratio of their age becomes 5:6 respectively. What is Ram’s present age?

5√2 cm in a circle. If the long chord makes a right angle at the centre, then what will be the length of the radius of the circle?

From the top of a hill 240 m high, the angles of depression of the top and bottom of a pole are 30° and 60°, respectively. The difference (in m) between the height of the pole and its distance from the hill is:

ABCD is a trapezium in which AB is parallel to CD and AB = 4 ( CD ) . The diagonals of the trapezium intersects at O. what is the ratio of area of triangle DCO to the area of the triangle ABO ?

Ishita can read a newspaper in 'n' minutes. What part of the newspaper can she read in 7 minutes (n>7)

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

What is the average number of students appeared from school B for all the years ?

if 50% of (x-y) =30% of (x+y), then what percentage of x is y?