Question

If 5 1/2 litres of oil cost 70.50, what will be the cost of 8 1/2 litres of oil?

Answer 1

Litres of Oil                                                                Cost

5 1/2 = 11/2                                                            70.50 rupees

8 1/2 = 17/2                                                                  ?

As, the quantity of oil increases its cost increases as well

Therefore we need to cross multiply the quantities

So, let the unknown quantity be x

11/2 * x = 17/2 * 70.50 or 70 1/2

x = 17/2 * 141/2 * 2/11

= 108.95 rupees

Answer 2

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