Ship A departs port P and sails due east at 20 km/h

MATHEMATICS · Subjective · A Level · Mathematics · Differentiation · Differentiation

Problem

Ship A departs port P and sails due east at 20 km/h, while Ship B departs the same port at the same time and sails due north at 15 km/h. Calculate the rate at which the distance between the two ships is changing when Ship A is 60 km east of port P.

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