If the height of a triangle is increased by 20% and its base is decreased by 15%, then what will be the percentage change in its area?
यदि किसी त्रिभुज (Triangle) की ऊंचाई 20% बढ़ा दी जाए तथा उसका आधार 15% घटा दिया जाए, तो उसके क्षेत्रफल (Area) में कितना प्रतिशत परिवर्तन होगा?
Answer और ExplanationAnswer and explanation
Answer: (A) Increase by 2%
क्षेत्रफल (Area) ∝ आधार × ऊँचाई
गुणक (Multiplying factor) = 1.20 × 0.85 = 1.02
✓
क्षेत्रफल 2% बढ़ता है।
Area ∝ base × height
Factor = 1.20 × 0.85 = 1.02
✓
The area increases by 2%.
Source: RRB Group D · 05 Feb 2026 · Shift 2। Solution: Prashant Sir, Vijayastra।Source: RRB Group D · 05 Feb 2026 · Shift 2. Solution by Prashant Sir, from Vijayastra.