What is the approximate range of height above sea level for stratosphere?
A bus covers a distance of 240 km at a uniform speed. Due to heavy rain its speed gets reduced by 10 km/h and takes two hours longer to cover the distance. Assuming the uniform speed to be 'x' km/h, form an equation and solve it to evaluate 'x'.
A sports car covers a distance in 100 min, if it runs at a speed of 96 kmph on an average. The speed at which the car must run to reduce the time of journey to 80 min will be