Raju walks to his school at a distance of 6 km with constant speed of 2.5
km/hour and walks back with a constant speed of 4 km/hour. What is his average
speed
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Step-by-step explanation:
Time taken to cover 6km t1=6/2.5.=60/25=2.4 h
Time taken during walk back t2=6/4
=1.5 h
Total time taken in journey = t1 + t2
= 2.4h + 1.5 h
=3.9 h
Average speed = total distance covered/total time taken
Average speed =6+6/3.9 =12/3.9 =3.09 km/h
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