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प्रश्न
These log boats do not go very far. If the wind is helpful, then travel about 4 km in one hour.
How long will they take to go a distance of 10 km?
उत्तर
In 1 hour the boat travels 4 km
Hence, in 2 hours the boat will travel 2 × 4 = 8 km
And in `1/2` hour the boat will travel `4/2` = 2 km
So, in 2 and a half-hour, the boat will travel 8 + 2 = 10 km.
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