alleryచక్కెర ధర 25% పెరిగితే, ఖర్చు మారకుండా ఉండాలంటే వినియోగం ఎంత శాతం తగ్గాలి?
A15%
B20%
C25%
D30%
Answer & Solution
Correct answer: B. 20%
అవసరమైన పతనం = r/(100+r) x 100 = 25/125 x 100 = 20%.
**చెక్:** కొత్త ఖర్చు = 1.25 x 0.80 = 1.0, మారలేదు.
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