Railways PYQCBT 1 2020

RRB NTPC · Question 41

If the length and breadth of a rectangular plot of land are increased by 10% and 8% respectively, then by how much percentage will its area increase or decrease?

  1. 16.8% increase

  2. 18.8% decrease

  3. 18.8% increase

  4. 16.8% decrease

Show answer & explanation

Answer: (C) 18.8% increase

Explanation

New area = 1.10 × 1.08 = 1.188 times the old area – an 18.8% increase.