Discussion

Question:

A car completes a certain journey in 16 hours. It covers half the distance at 20 km/h and the rest at 30 km/h. The length of the journey in km is :

Explanation:

Let the distance travelled during each half be x km.

Then $\frac{x}{20} + \frac{x}{30} = 16$

⇒x=192

∴ Length of journey = 2 × 192 = 384 km

Hence, option (b).

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