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Multiple choice·Routine exam skill (2/5)·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

Water flows steadily through a pipe. At section 1, area is 4 cm24\text{ cm}^2 and speed is 3 m s−13\text{ m s}^{-1}. At section 2, area is 1 cm21\text{ cm}^2. The speed at section 2 is
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cbse-physics-11.u7.t7-3.mc.003

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