A boat covers 32km upstream and 36km downstream in 7hrs. Also it covers 40km upstream and 48km downstream in 9 hours. Find the speed of the boat in still water and that of the stream?

WHAT ARE THE FORMULAS FOR FINDING THE INITAL SPEED

What is the formula of \[{x^2} + {y^2} + {z^2}?\

What is a dodging number?

What is the value of $ 5 $ million dollars in Indian rupees given that one dollar is equal to $ 75 $ Indian rupees.

How many perfect cubes can you find from 1 to 100? How many from -100 to 100?