Question

Find the average speed of bus covering 100km with a speed of 72kmph and next 100km with a speed of 36kmph

Answer 1

Answer:

98km/13hr

Explanation:

$speed \times time = distance$

Average speed=

$total \: distance \: covered \div \: total \: time \: taken$

Total distance covered =100 km+100 km

= 200 km

To time taken= 100/72 + 100/36

= 325/12

Average speed= 200/325/12

= 200 x 12/ 325

= 2400/325

=98km/13hr