Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ — decoded step-by-step.
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Q · Waves and SoundModerate · 45s
A wave has a frequency of 500 Hz and a wavelength of 0.68 m. What is its speed? 68
TopicWaves and Sound
Question Typemultiple choice
DifficultyModerate
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
v = fλ = 500 × 0.68 = 340 m/s.
76
Final Answer: Option A — 340 m/s
71