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Railways PYQCBT 1 2016

RRB NTPC · Question 81

The length of a diagonal in cms of a rectangle of length 5 cm and width 3 cm is: A. \(\sqrt {34} \) B. \(\pm \sqrt {34} \) C. 4 D. ± 4

  1. D

  2. B

  3. A

  4. C

Show answer & explanation

Answer: (C) A

Explanation

Diagonal = √(5² + 3²) = √34 cm. A length cannot be negative, so ±√34 is wrong.