Question

A car covers a distance of 765 km in 51 litres of petrol how much distance would it cover in 30 litre of petrol ​

Answer 1

Answer:

51 litres= 765km

30 litres=(?)

30*765/51

450 km

Answer 2

The car would cover a distance of 450 km in 30 litres of petrol.

• Given,

Distance travelled by a car = 765 km

Quantity of petrol consumed in covering 765 km = 51 l

Distance travelled by the car in 30 l of petrol = ?

• By applying simple unitary method, we can calculate the distance travelled by the car in 30 litres of petrol.

• As the name suggests, unitary means one. Therefore, in unitary method, we first have to calculate the distance covered by the car in 1 l of petrol.

∴   Distance covered by the car in 1 l of petrol = 765 km / 51

• Now, distance covered by the car in 30 l of petrol would naturally be more than that covered in 1 l of petrol. Thus, 30 is multiplied by (765 km / 51).

•  ∴ Distance travelled by the car in 30 l of petrol = (765 km / 51) × 30

= (765 km × 30) / 51

= 450 km (Answer)