a) 22%
b) 12%
c) 15%
d) 9.09%
Answer: b
Explanation: Time × Rate = total charges
100 × 100 = 10000
X × 125 = 110 [25% increase in rate, user can afford only 10% increase]
X = $$\frac{{110}}{{125}} \times 100$$ = 88%
Thus, decrease in time = 12%
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