Multiple choice

Instead of normal weighing scale a shopkeeper used forged scale. He used 1.4 kg scale while buying and 840g scale while selling, what will his overall profit percentage, if in the end he offers 10% discount? सामान्य तौल पैमाने के बजाय एक दुकानदार जाली पैमाने का उपयोग करता है। उसने खरीदते समय 1.4 किलो स्केल का इस्तेमाल किया जबकि बेचते समय 840 ग्राम पैमाने का, उसका कुल लाभ प्रतिशत क्या होगा, अगर अंत में वह 10% छूट प्रदान करता है?

  1. 30%

  2. 40%

  3. 50%

  4. 60%

  5. 70%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Buying with 1.4kg scale: For every 1.4kg paid, shopkeeper gets 1kg actual. CP for 1kg = CP_actual × (1/1.4). Selling with 840g scale: For every 840g given, customer pays for 1kg. SP for 1kg = SP_actual × (1/0.84). Effective SP after discount = 0.9 × SP. Profit % calculation yields 50%. Option C is correct. The false weighing on both sides amplifies the profit significantly despite the discount.

Keep practicing — related questions