A car moving on a straight road covers one third of the distance with 20 km/hr and the rest with 60 km/hr. The average speed is
A train covers a distance of 600km at km/hr. Had the speed been ( + 20) km/hr, the time taken to cover the distance would have been reduced by 5 hrs. Write down an equation in and solve it to evaluate .
Abirami has covered some distance with a speed of 20 km/hr in 5 hrs. And then some more distance in another 5 hrs, with a speed of 30 km/hr. Find the average speed for her entire journey.