Question

If 3 1/2 litres of petrol costs rupees 270 3/8,then find the cost of 4 litres of petrol

Answer 1

3½ litres petrol costs = Rs. 270⅜

So, 1litre petrol costs = (270⅜)/(3½)

Hence,

4 litres of petrol will cost =

$\frac{270(3/8) }{3 (1/2)} \times 4 \\ = \frac{ (2163/8) }{ (7/2)} \times 4 \\ = \frac{2163 \times 2}{7 \times 8} \times 4 \\ = 309$