Question
A motorist used 5/7 of petrol in his tank for a journey if the tank originally contains 42 l what quantity of petrol is remaining
Answers
GPT-4o mini
To find the quantity of petrol remaining in the tank, we first need to determine how much petrol was used for the journey.
The motorist used \( \frac{5}{7} \) of the total petrol. The original amount of petrol in the tank is 42 liters.
1. Calculate the amount of petrol used:
\[
\text{Petrol used} = \frac{5}{7} \times 42
\]
\[
\text{Petrol used} = \frac{5 \times 42}{7} = \frac{210}{7} = 30 \text{ liters}
\]
2. Now, calculate the remaining petrol in the tank:
\[
\text{Remaining petrol} = \text{Original petrol} - \text{Petrol used}
\]
\[
\text{Remaining petrol} = 42 - 30 = 12 \text{ liters}
\]
Therefore, the quantity of petrol remaining in the tank is **12 liters**.
The motorist used \( \frac{5}{7} \) of the total petrol. The original amount of petrol in the tank is 42 liters.
1. Calculate the amount of petrol used:
\[
\text{Petrol used} = \frac{5}{7} \times 42
\]
\[
\text{Petrol used} = \frac{5 \times 42}{7} = \frac{210}{7} = 30 \text{ liters}
\]
2. Now, calculate the remaining petrol in the tank:
\[
\text{Remaining petrol} = \text{Original petrol} - \text{Petrol used}
\]
\[
\text{Remaining petrol} = 42 - 30 = 12 \text{ liters}
\]
Therefore, the quantity of petrol remaining in the tank is **12 liters**.