It is clearly given in the statement the exercise is necessary to maintain good health, which means that exercise is pre-requisite for good health. Secondly, an advertisement gives this advice. Hence, it is supposed that such advertisements have some effect on people.
Sun rises in the east in the morning. Since the shadow of Suresh falls to his right. So he is facing South.
From the given directions, now he is 1km in the North-West direction.
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