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A hydrogen filled balloon ascending at t...

A hydrogen filled balloon ascending at the rate of 18 kmph was drifted by wind. Its angle of elevation at 10th and 15th minutes were found to be `60^(@)` and `45^(@)` respectively. The wind speed (in whole num- bers) during the last five minutes, approximately, is equal to:

A

7km./hr

B

11 km./hr

C

26 km./hr.

D

33 km./hr.

Text Solution

Verified by Experts

The correct Answer is:
D
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