MHT CET 2023 Mathematics question
A rod AB, 13 feet long moves with its ends A and B on two perpendicular lines OX and OY respectively. When A is 5 feet from O, it is moving away at the rate of 3 feet/sec. At this instant, B is moving at the rate
Answer: (C)
Solution
Let and . Since , . When , . Differentiate with respect to : ft/sec.
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