Question

9. What should a bridge be built over river?
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Answer 1

Answer:

Generally Bridges with pillars in water are build by using sand bags to divert water from an area. This makes the area dry after few days. Then the foundation is laid on the surface and this process carries on to give the required number of foundation pillars on the water bed.

Explanation:

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Answer 2

Answer:

a over bridge made by strong wall