Question

Two cars, Car A and Car B, are traveling on a highway. Car A starts from point X and travels at a constant speed of 60 km/h, while Car B starts from the same point X but travels at a constant speed of 80 km/h. If both cars travel for 1.5 hours, what is the difference in distance covered by Car B compared to Car A?

• A. 35 km
• B. 30 km
• C. 20 km
• D. 25 km

Hint:

Always multiply speed with time directly for constant speed problems. Ensure time is in hours for km/h units.

Answer 1

The Correct Option is B

Step 1: Use the formula: Distance = Speed × Time Car A: Speed = 60 km/h, Time = 1.5 h \[ \Rightarrow {Distance}_A = 60 \times 1.5 = 90 { km} \] Car B: Speed = 80 km/h, Time = 1.5 h \[ \Rightarrow {Distance}_B = 80 \times 1.5 = 120 { km} \] Step 2: Difference = Distance\(_B\) - Distance\(_A\) \[ \Rightarrow 120 - 90 = 30 { km} \]