Problema Solution
A MAN CYCLES FOR TWO HOURS AT AN AVERAGE SPEED OF 16KM/H AND THEN WALKS FOR 3 HOURS AT AN AVERAGE SPEED OF 6KM/H. FIND HIS AVERAGE SPEED FOR THE WHOLE JOURNEY
Answer provided by our tutors
first lets calculate the whole length of travel : L = (2×16) (3×6) = 50Kmand we know that this man traveled for t = 5 hours in all.so the average speed is : V = 50/5 = 10 Km/h again the same approach:L = 68 20 = 88 Kmt = (68/51) (20/40) = 1.83 hV = 88/1.83 = 48 Km/h