Question

A car travels 59.5 km in 3.5 litres of petrol. How many kilometres will Ramneek drive in 21 litres of petrol.

Answer 1

Hint: In this question first we need to find the value of unit litre corresponding to how much travelling of the car, after it is simply the case of multiplication.This question basically uses the concept of unitary method. In the unitary method we first find the unit value of any quantity, then we multiply the given quantity with unit quantity value.

Complete step-by-step answer:
Given, the car travels 59.5 km in 3.5 litres of petrol.
First find the mileage of the car driven by Ramneek.
Now use the unitary method as in 3.5 litres of petrol car travels 59.5 km.
So, in 1 litre a petrol car will travel $ \dfrac{{59.5}}{{3.5}} = 17 $ km.
So, the mileage of the car is 17 kilometer per litre, i.e., in one litre it will travel 17 kilometer.
So, for 21 litres of petrol a car will travel $ 21 \times 17 = 357 $ km.
Therefore, Ramneek will drive for 357 km in 31 litres of petrol.

Note: Mileage is the distance travelled by any vehicle when a unit litre of fuel is given to it.
Mileage of any vehicle depends on the manufacturer of the vehicle, basically larger vehicles have less mileage.
The mileage also depends on the efficiency of the vehicle.