Answer:
(a) An aeroplane is flying at a height of two thousand metre above the ground can be written as + 2000 m because height above the ground is taken as positive. (b) A submarine is moving at a depth eight hundred metre below the sea level can be written as ? 800 m because depth below the sea level is taken as negative. (c) A deposit of rupees two hundred can be written as + Rs. 200 because deposit is represented with + sign. (d) Withdrawal of rupees seven hundred can be written as ? Rs. 700 because withdrawal is represented with - sign.
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