In a school there are 2000 students. On January 2nd, all the students were present in the school except 4% of the boys and on January 3rd, all the students are present in the school except 28/3% of the girls, but on both the days' number of students present in the school, were same. The number of girls in the school is –

Find the minimum value of $$ {25 cosec^{2}θ +25sin^{2}θ}$$

If the length of one side and the diagonal of a rectangle are 7 cm and 25 cm respectively, then find its perimeter (in cm).

A train 300 m. long is running with a speed of 54 km/hr. In what time will it cross a telephone pole?

In a kilometer race, A can give B a start of 100 m or 15 seconds. How long does A take to complete the race?

Direction: The following diagram shows the percentage of population of Hindus, Sikhs and Muslims with respect to total population in a town during 2005 to 2008. Study the diagram and answer the questions:

Percentage decrease in Hindu population from 2005 to 2008 is

The arithmetic mean of the following data is .

23, 17,20,19,21

A polygon has 14 sides then find out No. of diagonals in that polygon.