For the following questions answer them individually
The time taken by a boat to travel a distance downstream is half the time taken by it to travel the same distance upstream. What is the speed of the boat downstream if it travels 7.5 km upstream in 1 hour 30 minutes ? (in km/h)
In these questions, two equations numbered I and II are given. You have to solve both the equations and select the appropriate option.
What approximate value will come in place of, the question mark (?) in the following questions ? (You are not expected to calculate the exact value).