DieselShip's Online Content Library

Q6. (a) A patrol boat travelled 27 miles from port A on a course 031° and then 18 miles on a course 111°. After a brief stop it returns to port A by the shortest route.

Calculate EACH of the following:

(i) the course that must be set in order to return to port A; (6)

(ii) the return distance to port A. (4)

(b) An alternating voltage, v volts, is given by the formula:

where t is the time in seconds. (t > 0)

Calculate the least value of t when v = 20 volts. (6)