Question

The ratio of the speeds of a car and a bus is 3: 4. if the bus covers a distance of 320 km in 4 hours, what is the speed of the car in km/h?

• A. 60 km/h
• B. 75 km/h
• C. 80 km/h
• D. 90 km/h

Answer 1

Answer:

A. 60 km/h

Given:

Speed ratio of car : bus = 3 : 4

Step 1: Find the bus's speed

$\text{Speed}=\frac{\text{Distance}}{\text{Time}}$

$\text{Bus speed}=\frac{320}{4}=80\text{ km/h}$

Step 2: Find the car's speed

$\frac{\text{Car speed}}{\text{Bus speed}}=\frac34$
$\text{Car speed}=80\times\frac34=60\text{ km/h}$
Answer: 60 km/h