Explanation:
Here,
a). As the graph is given that in 10litre of petrol 10 km can be covered .
then, in 1 liter petrol 1 km is covered.
so,
i). ans is 30 km .
ii). ans is 42km.
b). rate of petrol (r)= RM. 2.30
travelled km= 36.
used petrol = 36 litres (as per the information in graph).
now, total cost (tc)= r×used petrol
or, tc= RM. 2.30 × 36
Therefore, the total amount is RM.82.2.
Hope it helps...