Zeenat and Nasreen participate in a circular race of 1.2 km. They start the race at a speed of 18 km/h and 27 km/h. respectively, from the same point at the same time. After how much time (in minutes) will they meet at the starting point for the first time, if they are running in the same direction?

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Question

This question was previously asked in

SSC CHSL Exam 2023 Tier-I Official Paper (Held On: 02 Aug, 2023 Shift 1)

Answer 1

Given:

The total race was 1.2 km.

The speed of Zeenat is 18 km/h and The speed of Nasreen is 27 km/h.

Concept used:

Distance = Speed × time

Relative speed in the same direction is the difference of their speed.

Calculation:

Relative speed will be (27 - 18) km/h = 9 km/h

The relative distance is 1.2 km

So the time will be,

⇒ (1.2 / 9) × 60

⇒ 0.4 × 20 = 8 minutes

∴ The correct option is 4

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