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Josiah bought 10 litres of petrol for R220. How much would it cost to fill up his mom's car that will take 17 litres?

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Answer:

Explanation:

Now, in question the only information which is provided is that A car is covering a distance of 145 km in 10 litres of petrol. And we have to find how many kilometres a car will go in 20 litres of petrol and also how much petrol is required to cover a distance of 261 km.

Now, let us first find how many kilometres does a car cover in 1 litre of petrol.

Here, the car covers 145 kilometres of distance in 10 litres.

So, in 10 litres = 145 km distance covered.

So, distance covered by a car in 1 litre of petrol will be equals to

1 litre =14510

km

14510=14.5

km

That is, in one litre of petrol a car travels a total distance of 14.5 km.

Now, we have to find how many kilometres a car travels in 20 litres of petrol.

So, we have 1 litre =14510

km

Then, in 20 litre of petrol, we have

20 ×1 litre

=14510×20

km

On Simplifying, we get

14510×20=145×2km= 290 km.

Hence in 20 litres of petrol a car travels a total distance of 290 km.

Now, we have to find that, to cover 261 kilometres how much litres of petrol do cars need.

If, we have 1 litre =14510

km, then

We can re - write it as 10145litres=1km

which means t cover 1 kilometre of distance, we need 10145litres

of petrol.

So, for 261 km of distance petrol needed will be equals to

261×1km=261×10145litres

On simplifying, we get

261km=2610145litres

Dividing 2610 by 145, we get

261km=18litres

So, to cover 261 kilometres, 18 litres of petrol is needed by a car.

User Moiz Tankiwala
by
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