Question

Two cars A and B travel from one city to another, at speeds of 72 km/hr and 90 km/hr respectively. If car B takes 1 hour lesser than car A for the journey, then what is the distance (in km) between the two cities?

• A. 270
• B. 300
• C. 360
• D. 380

Answer 1

Answer:

C. 360

Let the time taken by A be x hrs, therefore time taken by B will be (x – 1) hrs ⇒ 72x = 90(x – 1) ⇒ x = 5 hrs Distance between cities = 72 × 5 = 360 kms