Which type of waste has to be added with tar to create water repellant roads?

Paper

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Vegetable waste

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Plastics

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Metals

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Solution

The correct option is C Plastics
The non-bio-degradable material poses a serious problem of its disposal. Newer technologies are being invented where the non-bio-degradable material like plastic and styrofoam etc are added with the coal tar which is traditionally used for making roads. Such mixing gives the added advantage of making the roads water resistant. It also reduces the wear and tear of roads.

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Which type of waste has to added to tar to create water repellant roads?

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Give reasons why :

(a) Waste water should not be allowed to stagnate in puddles.

(b) Waste water from a factory should not be allowed to mix with drinking water.

(d) The quantity and types of garbage generated have increased.

24.375 kilometres of road in a panchayat needs tarring. Of this, 18.43 kilimetres has been tarred. How much more remains to be tarred?

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