Question

a bus requires 19 litres of petrol to travel distance of 399km.
(i) how far the bus can travel in
50 litres petrol.
(ii) given that the cost of petrol
$2. 45 per litre, what is the cost of petrol required to travel 815 km?
Step by step
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Answer 1

Answer:

The answers are

(i) 1050km

(ii) $15.840

Step-by-step explanation:

• First, we need to write 19 litres for 399km in ratio. That will be,

$19:399$

• Now we divide the whole ratio by 19 because we want the litres to be 1 so that we can multiply it later with 50 to get our answer.

$\frac{19}{19} : \frac{399}{19} = 1:21$

• Now multiple the whole ratio with 50 to get the answer for part (i) i.e get the distance covered with 50 litres.

$1×50:21×50=50:1050$

• Now, we need to solve part (ii). This time we divide the original ratio ( 19:399) with 399. After dividing we get,

$0.047:1$

• Now multiple the whole ratio with 815 to get the amount of petrol used for 815km. After multiplying we get.

$38.809:815$

• Now divide 38.809 by 2.45 and you shall get your answer that is $15.840.
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