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Short answer·Hard exam skill (4/5)·No calculator

Difficulty guide

The label describes the problem, not your ability.

1/5 - Foundational

Warm-up setup; checks one basic idea.

2/5 - Routine exam skill

Normal syllabus skill; usually one main rule or interpretation.

3/5 - Standard multi-step

Exam-style problem with multiple steps or a common trap.

4/5 - Hard exam skill

High-end exam problem; combines methods carefully.

5/5 - Challenge

Stretch problem beyond normal exam pressure.

Question

A person walks 3030 m towards a tower on level ground. The angle of elevation of the top changes from 30∘30^\circ to 60∘60^\circ. Find the height of the tower.
Total: 4 marks

(a) Find the tower height. (4 marks)

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cbse-math-10.u5.t5-5.saq.002

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