An aeroplane flies from place A to place B at the speed of 500 km/hr. On the return journey, its speed is 700 km/hr. The average speed of the aeroplane for the entire journey is ?
A. $$566\frac{2}{3}{\text{ km/hr}}$$
B. $$583\frac{1}{3}{\text{ km/hr}}$$
C. $$583\frac{2}{3}{\text{ km/hr}}$$
D. $$600{\text{ km/hr}}$$
Answer: Option B
Solution (By Examveda Team)
Average speed :$$\eqalign{ & {\text{ = }}\left( {\frac{{2 \times 500 \times 700}}{{500 + 700}}} \right){\text{ km/hr}} \cr & {\text{ = }}\left( {\frac{{1750}}{3}} \right){\text{ km/hr}} \cr & {\text{ = }}583\frac{1}{3}{\text{ km/hr}} \cr} $$
This Question Belongs to Arithmetic Ability >> Speed Time And Distance
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