The speeds of two vehicles are 20 km/h and 45 km/h. Find the mean proportional between the two speeds.
The speeds of two vehicles are 20 km/h and 45 km/h. Find the mean proportional between the two speeds.
दो वाहनों की चाल क्रमशः 20 किमी/घंटा और 45 किमी/घंटा है। इन दोनों चालों के बीच माध्य समानुपाती (Mean Proportional) ज्ञात कीजिए।
Detailed Solution & Logic
Correct Answer:
30 km/ h
Mean proportional between two numbers $a$ and $b$ is:
$\sqrt{ab}$
Here the two speeds are 20 km/h and 45 km/h.
Mean proportional:
$\sqrt{20\times45}$
$=\sqrt{900}$
=30
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