Question

while arriving jayanth travels 30 kilometers a uniform speed of 40 kilometer per hour and next 30 kilometers with a uniform speed 20 kilometer per hour. find its average speed.

Answer 1

Answer:

<s>=80/3 km/hr

Explanation:

Let s1=30 km v1=40 km/hr t1=? (comes to be 3/4 hr)

     s2=30 km v2=20 km/hr t2=? (comes to be 3/2 hr)..,

<s>=ttl distance /ttl time..

i.e =<s>={s1+s2}

=> <s>=60/(9/4) km/hr

i.e <s>=80/3 km/hr