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A car uses 9 litres of petrol to travel 117 km. How many litres are needed for a 195 km trip?

Class 8Direct and Inverse ProportionsDirect and Inverse Proportions

A16
B14
C15
D30

Step-by-Step Solution

Petrol is in direct proportion to distance. Per km =

\frac{9}{117}

litre, or

\frac{117}{9} = 13

km per litre. For 195 km:

\frac{195}{13} = 15

litres.

Answer: C) 15

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