13.) A person goes to his office from his
home with the speed of 7 km/h.
While returning home, his speed is
3 km/h. Find the average speed of
the person in the whole journey.
∆ Irrevelant answers will be directly reported∆
home with the speed of 7 km/h.
While returning home, his speed is
3 km/h. Find the average speed of
the person in the whole journey.
∆ Irrevelant answers will be directly reported∆
Answers & Comments
Step-by-step explanation:
let the speed from home to office = x
and the speed from office to home =y
Now,
Avg speed = 2xy/x+y
= 2×7x3/7+3
= 21/5
= 4.2 km/h