If a log-boat covers 20 km in 4 hours, then it will cover in 8 hours.

40 km

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30 km

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60 km

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80 km

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Solution

The correct option is A 40 km
Given,
The log-boat takes 4 hours to cover 20 km.

8 hours = 4 hours × 2

So, in 8 hours, the log-boat will cover twice the distance that it covered in 4 hours.

20 km × 2 = 40 km

Therefore, the log-boat will cover 40 km in 8 hours.

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