Chapter SH, Problem 1.12APP

To determine

To Calculate: The fuel efficiency of the first car.

Answer to Problem 1.12APP

The fuel efficiency of the first car is $\text{6}\text{.75 km/L}$ .

Explanation of Solution

Given data:

The car gets $45\%$ of the fuel efficiency of another car that travel $15\text{ km}$ on $\text{1 L}$ of gasoline.

Concept used:

Fuel efficiency is the distance travelled per unit volume of fuel used.

Calculation:

As per the problem,

Distance travelled by the second car on $\text{1 L}$ of gasoline $=15\text{ km}$

So, fuel efficiency of the second car is $15\text{ km/L}$

Now, the fuel efficiency of the first car is $45\%$ of the fuel efficiency of the second car.

Therefore,

Fuel efficiency of the first car = $\frac{45}{100}\times$ fuel efficiency of the second car.

Fuel efficiency of the first car $=\frac{45}{100}\times 15\text{ km/L}=6.75\text{ km/L}$

Conclusion:

The fuel efficiency of the first car is $\text{6}\text{.75 km/L}$ .