Ashifur August 8, 2023 - 14:23
Problem: The price of petrol drops by 40%. As a result, one \gets 5 liters more when one purchases petrol for Tk. 100. What is the present and what was the previous price of petrol per liter?

View all: ICB BANK | OFFICER | WRITTEN QUESTION (MATH) SOLVE | 1997

Correct Answer: TK $\frac{40}{3}$

Explanation:

In 100 Tk, the price of petrol reduced = TK 40

So, Present Price of 5 liter petrol = 40 TK

So, Present Price of 5 liter petrol =$\frac{40}{5}$= 8 TK

Again, at 40% reduction, price of petrol = 100-40 = TK 60

As present price TK 60, former price was = 100 TK

As present price TK 8, former price was = $\frac{100\cdot8}{60}$ TK = TK $\frac{40}{3}$

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