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RRB Junior Engineer / DMS / CMA 2019 · Question 581 of 3719

The angle of elevation of a hot-air balloon climbing vertically changes from 30° at 10:00 AM to 60° at 10:02 AM as observed from a point 300 m away from the take-off point. What is the upward speed of the balloon?

  1. A2.18 m/s
  2. B2 m/s
  3. C3.4 m/s
  4. D2.9 m/sCorrect

Answer: D. 2.9 m/s

Official answer key verified. Detailed explanation coming soon.

Source: RRB JE 2019 CBT-1 (22-May-2019 Shift 3) — cracku.in solved paper with answer key · reliable-secondary

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