Question

P covers the first one hour of his travel at 50
km/hr and the next two hours at 70 km/hr. What
is the average speed?
A. 60 km/hr
*B. 63.33 km/hr
C. 59.33 km/hr
D.62km/hr​

Answer 1

Answer:

B) 63.33km/hr

Step-by-step explanation:

average speed= total distance/ total time

total distance = distance traveled in first hour +distance traveled in next 2 hours

so total distance = v1t1 + v2t2= 50×1 + 70×2= 190

total time= t1 + t2= 1hour + 2hours= 3hours

so average speed= 190/3= 63.33km/hr