Exams

A balloon leaves from a point P rises at a uniform speed. After 6 minutes, an observer situated at a distance of 450√3 metres from point P observes that angle of elevation of the balloon is 60 deg. Assume that point of observation and point P are on the same level. What is the speed (in m/s) of the balloon?

Who invented Rocket?

What is the value of [(sin x + sin y) (sin x – sin y)]/[(cosx + cosy) (cosy – cosx)]?

The table given below shows the number of students who were absent and percentage of students who were present in the given two examinations from five different schools. The table also shows the percentage of students who were present in the Biology and Physics examination respectively.

What are the total number of students who were present in the Biology examination from all the schools together?

The table below shows the sales of milk in 6 different states as a percentage of total sales. In each state only two milkmen A and B sell the milk. the table below shows the sales of salesman A as percentage of total sale of milk in each state. The total sales of milk is 200000 litres.

What are the average sales of milk (in litres) by the salesmen A in all the given states?

Which of the following is not a nitrogenous fertiliser?

Select the option that correctly matches the contents of the first column with the contents of the second column.

If '←' stands for '+', '→' stands for '-', '↑' stands for '÷', '↓' stands for 'x', '^' stands for '=', then which of the following alternatives is correct?