A 125 metre long train travels at `90 km` / `h`. How much time
would it take to cross a 175 metre long bridge?

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?

The hydrolysis of an ester in acid medium is first order reaction. Half life period of a first order reaction is 20 seconds. How much time will it take to complete 90% of the reaction?

A train travels at an average speed of 36 km / h . How far will it go in 3 minutes?

A vehicle travels.at an average speed of 72 km / h . How much will it move in one second?

The time for half-life period of a certain reaction A rarr Products is 1 h. When the initial concentration of the reactant A, is 2.0 mol L^(-1) . How much time does it take for its concentration to come from 0.50 mol L^(-1) to 0.25 mol L^(-1) , if it is a zero-order reaction?