Question

While driving Jayant travels 30km with a speed of 40km/h and next 30km with a uniform speed of 20km/h. Find his average speed.

Answer 1

average speed= speed 1 +speed 2\2
                           =40+20\2
                           =60\2
                            =30 km/hr

Answer 2

Total distance covered=30+ 30 =60km
total time taken = 45min + 90min = 135 min
speed. =. 60/135=0.444444..km/hr
Confirm= 0.44444444...×135 =60