exam Maths Puzzle Numerical Ability

The current price of a litre of gasoline is $1.05 and is expected to increase at a rate of 12% every 6 months.The price of a litre of diesel is $0.95 and is expected to increase by

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the problem is....
the lengths of the legs of an isosceles triangle are integers. the base is half as long as each leg. what are the possible lengths of the legs if the perimeter is between 6 and 16 units?
Circle:
C=220 m.
Use 22/7 to find the approximate diameter