Question

If a car travels 60 km in 3 hours and a motorbike travels 80 km in 4 hours, the ratio of the average speed of the car to that of the motorbike is

• A. 3:4
• B. 4:3
• C. 1:1
• D. 6:8

Answer 1

The correct option is C 1:1

$\text{Average speed of the car}=Distance÷Time=60\text{km}÷3\text{hr}=\frac{20}{1}\text{km/h}$

$\text{Average speed of the motorbike}=Distance÷Time=80\text{km}÷4\text{hr}=\frac{20}{1}\text{km/h}$

$⟹\frac{\text{Average speed of the car}}{\text{Average speed of the motorbike}}=\frac{20}{20}=\frac{1}{1}$

$\therefore \text{The ratio of the average speed of the}$ $\text{car to that of the motorbike is 1:1}$