A person goes to his office at 1/3rd of the speed at which he returns from his office.
A person goes to his office at 1/3rd of the speed at which he returns from his office. If the avg speed during the whole trip is 30m/h. what is the speed of the person while he was going to his office?
Answer/Solution
20km/h
Steps/Work
u = k , v= 3k
\inline \therefore \frac{2uv}{u+v}\: \: \Rightarrow \frac{2\times k\times 3k}{(k+3k)}=30
\inline \Rightarrow 1.5k = 30
\inline \Rightarrow k=20km/h
E
\inline \therefore \frac{2uv}{u+v}\: \: \Rightarrow \frac{2\times k\times 3k}{(k+3k)}=30
\inline \Rightarrow 1.5k = 30
\inline \Rightarrow k=20km/h
E