A driver drove for $1\frac{2}{5}$ h at $78$ km/h before stopping for a break. He then conti

Question

A driver drove for $1\frac{2}{5}$ h at $78$ km/h before stopping for a break. He then continued travelling for another $3$ hours at $67$ km/h. If the average speed for the whole journey was $55$ km/h, find the duration of the break.

Accepted Answer

Approximately $1$ hour $14$ minutes (to the nearest minute)

Average Speed with a Break Duration Problem

Average Speed with a Break Duration Problem

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