By Mansi Yadav

Verified by Ajay Kumar

In a satellite imaging system, two base stations A and B are located on the perimeter of a circular ground station with a radius of 30 km. A satellite at point S inside the circle monitors both stations such that angle ASB = 60°. A ground operator walks along the outer ring path (major arc AB) to find the spot P from where the satellite S appears exactly between the two stations. Determine the maximum angle APB the operator can observe.

  1. 90°

  2. 75°

  3. 60°

  4. 120°

Answer: D

Solution

Source-marked answer: 120°. The PDF highlights option D in green. However, the printed description gives \(\angle ASB=60^\circ\) but does not specify a sufficient geometric relationship between this angle and \(\angle APB\) to derive 120° uniquely. The marked option is preserved from the source. Trick: For an exact solution to an angle-in-a-circle problem, identify the intercepted arc and establish the relationship between the centre angle and the inscribed angle.

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