A man AB of height 2m is standing at a distance of 4m from a tower of height of 10m. At top of Tower a point source S is kept and man is moving away from the tower at a speed of 2m/s
a) find the length of the shadow b) rate of change of the length of the shadow at the instant man is at 4m from tower.
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Answer and Explanation: a)6m (man's height +distance from tower) as the source s is placed on top of the tower.
b)s=2m/s
s=2x4m/s
s=8m/s.
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