RRB NTPC · Question 61
A balloon is connected to a meteorological station by a cable of length 130 m, inclined at 60° to the horizontal. Find the height of the balloon from the ground. Assume that there is no slack in the cable. A. 110.32 m B. 173 m C. 163.28 m D. 112.58 m
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Answer: (D) D
Explanation
The cable is the hypotenuse of a right triangle making 60° with the ground. Height = 130 × sin 60° = 130 × 0.866 ≈ 112.58 m.