Shyama's exam starts at 2 o' clock. To reach the place, she hás to travel 50 kilometres by bus and 175 kilometres by train: Average speed of bus journey is `20 ~km` / `h` and average speed of train journey is `50 ~km `/ `h .` To reach there 1 hour, before the exam, when should Shyama leave home?

If the average speed of a bus is 52 ""km / h . How much does it travel in 6 hours?

Rahim travelled 350 kilometres in a train and 150 kilometres in a bus. The average speed of the 'train was 70 km / h . The bus trip lasted 5 hours. What is the average speed of the entire trip?

If the average speed of a bus is 52 ""km / h . How long does it take to travel 520 kilometres at this speed?

Ramu and Salim travelled to Thiruvananthapuram from the same place, each in his own car. Ramu did the onward journey at an average speed of 120 ~km / h and return at 50 ~km / h . Salim did both trips at 60 ~km / h . Who made the total journey in less time?

A bus starts at 8 'o clock and travels at an average speed of 48 (km) / hr . A car starts from the same place at 8.30 and travels at an average speed of 60 (km) / hr . How much time does the car take to catch the bus?

A bus leaves Ernakulam at 6 in the morning and reaches Thiruvananthapuram at 12 noon, running 40 ~km / h on average. To reach one hour earlier, by how much should the average speed be increased?

Abu boarded a bus at 7 in the morning. Usually the bus travels 30 (km) / h on average, to reach the railway station at 11. But since it was raining, the bus could run only 20 (km) / h on average. Abu got down from the bus at 9 , caught a car and reached the station at 11 itself. What was the average speed of the car?

Two trains travelling along parallel tracks in the same direction do 50 (km) / h and 100 (km) / h on average. The faster train starts 2 , hours later than the slower. After how many kilometres will the faster train catch up?