7. A ship sails South 2 km, then turns West. If it sails at a rate of 10 kph, find the rate at which it is leaving the starting point after 30 minutes. a. 6.3 kph b. 7.3 kph C. d. 8.3 kph None of these

7. A ship sails South 2 km, then turns West. If it sails at a rate of 10 kph, find the rate at which it is leaving the starting point after 30 minutes. a. 6.3 kph b. 7.3 kph C. d. 8.3 kph None of these

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Question

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Instruction: Select the correct answer for each of the following questions. Follow the instructions. Kindly provide a COMPLETE and CLEAR solution. Answer it ASAP because I really need it right now. Answer should be typewritten.

7.
A ship sails South 2 km, then turns West. If it sails at a rate of 10 kph, find the rate at which it is leaving the starting
point after 30 minutes.
a.
6.3 kph
8.3 kph
b. 7.3 kph
None of these
8. A body 3 m from, and at the same elevation as, the lamp attached to the end of a vertical 6 m post is dropped. How
fast is the shadow of the body moving along the horizontal ground 1 second later?
a. -1.2 m/s
-7.5 m/s
b. -4.3 m/s
-8.1 m/s
C.
d.
C.
d

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