Of the three numbers, the ratio of the first and the second is 8 : 9 and that of the second and third is 3 : 4. If the product of the first and third number is 2400. then the second number is: 

In the following question, by using which mathematical operators will the expression become correct?
30 ? 6 ? 4 ? 5 ? 4

A coconut tree swings with the wind in such a manner that the angle covered by its trunk is 18 degrees. If the topmost portion of the tree covers a distance of 44 metres, find the length of the tree.

Translate the following sentences into English choosing the correct alternative from the options given below:

बढ़ते तापमान से पर्यावरण को वास्तविक खतरा है। 

A line passing through the origin perpendicularly cuts the line 3x – 2y = 6 at point M. Find the co-ordinates of M. 

The government of which state has recently started the mission foundation for children to study?

Seema’s present age is four times her son’s present age and four seventh of her father’s present age. The average of the present age of all three of them is 32 years. What is the difference between the Seema’s son’s present age and Seem’s father’s present age?

Shyam covers a distance of 400 km in 5 hours. He traveled for some time at a speed of 85 km / h and the rest at a speed of 55 km / h. How long did he travel at high speed?