A tourist took 1h 20 minutes to travel by an aircraft from town T(30S,350E) to town U(90N,350E). (Take the radius of the earth to be 6370km and π=227(a) Find the average speed of the aircraft.(b) After staying at town U for 30minutes, the tourist took a second aircraft to town V(90N,50E). The average speed of the second aircraft was 90% that of the first aircraft. Determine the time, to the nearest minute, the aircraft took to travel from U to V.(c) When journey started at town T, the local time was 0700h. Find the
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