Physics, asked by manishanand234, 1 year ago

A train travel 15 km at a uniform speed of 30km/hr the next 75 km at a uniform speed at the speed of 50km/hr and the last 10km at a uniform speed of 20km/hr. CALCULATE THE AVERAGE SPEED FOR THE ENTIRE TRAIN JOURNEY

Answers

Answered by sangdilsamp925cl
9
the train travel 15 km at a speed of 30 km/ hr 
it means the time travel by the train at the speed of 30km /hr is 30mins


lly the train travel nex 75 km at a speed of 50km/hr
it means that the time travel by the train at this speed is 1.5 hrs= 90 mins

lly the train travel last 10km at a speed of 20km/hr 
it means the time travel by the train at this speed is 30 min



there fore the total distance travel by the train = 30+20+75=125km
and the total time taken by the train=30+30+90=150minsor 2.5 hrs

av speed = total distance by total time
     
                 125/2.5 = 50 km/hr 

Similar questions