why nonmetal roads go out of service in rainy season________stick to the question
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Answer:
Metalled roads are all weather roads, whereas unmetalled roads are difficult to use in the rainy season, as their upper surface becomes uneven due to absorption of rain water. The reason is that metalled roads have a waterproof coating on the upper surface, making them usable in all seasons.
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Explanation:
Metalled road are made up of concrete concrete cement etc. and the nonmetal road are are made up of mud and no concrete and cement etc. metal roads are are used all over the year all we can say that it is perennial on the other hand nonmetal roads cannot be used annually and it gets muddy in the rainy season
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