Bus travels250km south in straight path with average velocit

Bus travels250km south in straight path with average velocity of 82km/h to south. bus stops for 26min then travel240km south with velocity70km/h south?

What is the average velocity for the total trip? answer in units of km/h

Solution

The bus moves 250 kms towards south with a velocity 82 kms/h

Therefore , the time taken by the bus for this displacement = 250/82hrs =3.048780488=182.9268293 min

The duration of halt =26 mts

Again it moves in southern direction for 240 kms at 70 kms/hr. So, the time taken for this stretch=240/70hr =205.7142857

Threfore total time taken =182.9268293+26+205.7142857=414.641115 mts.Totaldisplacement in sothern direction =490kms

Therefore, the velocity southward =490/414.641115kms/min =1.181744845 km/minute=1.181744845*60=70.9047km/h