Question

An object moves through 10 km in 2 min and next 20 km at a speed of 60 km per hour . Calculate its average speed

Answer 1

Time taken to travel 20 km with speed 60 km/hr = 20/60 = 1/3 hr = 20 min

 

Time taken to travel total distance = 2 + 20 = 22 min

 

Total distance = 20000+10 = 20010 m

 

average speed = Total distance / Total time = 20010 / (22×60) = 15.16 m/s