Multiple choice

Which information are necessary to answer the questions asked- What is the height of the tower? A. It is viewed at a distance of 48 m at an angle of elevation of 30°. B. It casts a shadow of 25 m. C. If it is viewed at a certain distance it makes an angle of elevation of 30°, and when it moves 23 m towards the tower the angle of elevation becomes 60°.

  1. Only A and B together

  2. Any two of them

  3. Only C

  4. B and either A or C

  5. Questions can’t be answered even after using all the informations.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Statement A alone gives height = 48 × tan 30°. Statement C gives two angles at known distances, allowing tan relationships. Statement B (shadow) needs the sun's elevation angle, which either A or C can provide.

Keep practicing — related questions