Question

The amount of fuel present in the bus is indicated by f.
The capacity of the fuel tank is 100 L. The amount of fuel present in the bus is .

• A. 25 L
• B. 75 L
• C. 0.25 L
• D. 0.75 L

Answer 1

The correct option is B 75 L

Given:
$\text{0.4f - 1.2 - 1.4f}=\frac{-10}{2}\text{f}+1.8$

Sipmlifying $\frac{-10}{2}=-5$

$⟹\text{0.4f - 1.2 - 1.4f}=-5\text{f}+1.8$

Separate the like terms

$⟹\text{0.4f - 1.4f + 5f}=1.8+1.2$

Simplifying

$⟹\text{4f}=3$

$⟹\text{f}=\frac{3}{4}$

$\because$ The capacity of the tank is 100 L.

$⟹$ Fuel present $=\frac{3}{4}\times 100$

$⟹$ Fuel present $=75\text{L}$

$\therefore$ The amount of fuel present in the bus is 75 L.