On a 100km track, a train travels the first 30 km at a uniform speed of ` 30 kmh^(-1)`. How fast must the train travel the next 70 km so as to averge the next `40km h^(-1)` for entire trip.

On a 60 km track, a train travels the first 30 km with a uniform speed of 30 kmh^(-1) . How fast must the train travel the next 30 km so as to average 40 kmh^(-1) for the entire trip ?

On a 100 km track, a train mvoes the first 50 km with a uniform speed of 50 km h^(-10 How fast must the train travel the next 50 km so as to have average speed 60 km h^(-1) for the entire trip ?

On a 80 km track, a train travels 40 km with a uniform speed of 30 km h^(-1) . How fast must the train travel the next 40 km h^(-1) as to have average speed 40 km h^(-1) for the entire trip?

On a 60 km straight road, a bus travels the first 30 km with a uniform speed of 30 km h^(-1) . How fast must the bus travel the next 30 km so as to have average speed of 40 km h^(-1) for the entire trip ?

On a 60 km stretch of road a cyclist travels first 20 km at a uniform speed of 20 km h^(-1) . How fast must he travel the remaining distance so that his average speed is 10 km h^(-1) for the entire trip.

On a 60 km stretch of road a cyclist travels first 20 km at a unifrom speed of 20 km h^(-1) . How fast must he travel the reamaining distance so that his average speed is 10 km h^(-1) for the entire trip.

The distance between two statios is 200km.A train travels goes the first 100km at a speed of 10km/hr. How fast should the train travel the next 100km so as to average 70km/hr for the whole journey.

On a journey of 80km, a car covers the first 40km with a uniform of 80km/hr. how fast it should travel in the next 40km so that an average speed of 100km/hr is maintained for the entire journey?