Question

One litre of petrol costs Rs $46\frac{3}{4}.$ What is the cost of 35 litres of petrol?

Answer 1

Cost of 35 litres of petrol = $35\times 46\frac{3}{4}$
$$\begin{gathered} =35\times \left(46+\frac{3}{4}\right) \\ =35\times \frac{187}{4} \\ =\frac{35}{1}\times \frac{187}{4} \\ =\frac{35\times 187}{1\times 4} \\ =\frac{6545}{4} \\ =\mathrm{Rs}1636\frac{1}{4} \end{gathered}$$
Therefore, the cost of 35 litres of petrol is Rs $1636\frac{1}{4}$.