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A kite is flying at a height of 30m from...

A kite is flying at a height of 30m from the ground. The length of string from the kite to the ground is 60m. Assuming that three is no slack in the string, the angle of elevation of the kite at the ground is:
(a) `45^0`
(b) `30^0`
(c) `60^0`
(d) `90^0`

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