MCQOPTIONS
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MCQOPTIONS
| 1. |
A train goes from P to Q with an average speed of u km/h and returns from Q to P with an average speed of v km/h. What is its average speed for the entire journey in km/h? |
| A. | \(\frac{{2uv}}{{u + v}}\) |
| B. | \(\sqrt {\frac{{{u^2} + {v^2}}}{2}} \) |
| C. | \(\frac{{u + v}}{2}\) |
| D. | √uv |
| Answer» B. \(\sqrt {\frac{{{u^2} + {v^2}}}{2}} \) | |