Question

2. A bus can travel 9 km with 1 l of diesel. How many litres of diesel is required to travel 504 km ?
​

Answer 1

Solution :

Diesel needed to travel 1 km = x

Diesel needed to travel 9 km = 1 litre

1x = 9

⇒ x = 9 ÷ 1

⇒ x = 9

∴Diesel needed to travel 504 km =(504 ÷ 9) l

= 56 litre

Ans : 56 litre of diesel is required by the bus to travel 504 km.

Answer 2

Answer:

Diesel needed by the bus for travelling 9 km = 1 l

Diesel needed by it for travelling 1 km

$= \frac{1}{9} \: l$

Diesel needed by it for travelling 504 km

$= (\frac{1}{9} \times 504) \: l \\ = \frac{504}{9} \: l \\ = 56 \: l$

∴ The bus needs 56 l of diesel to travel 504 km.