Problema Solution
A man walks 36 miles partly at a speed of 4 mph and partly at 3 mph. If he had walked at a speed of 3mph when he had walked at 4, and at 4mph when he had walked at 3, he would have gone only 34 miles. Find the total time he was walking.
Answer provided by our tutors
from given
36 = 4 t1 + 3 t2 - - -- - - (1)
34 = 3 t1 + 4 t2 ---- -- - - - (2)
solvung (1) and (2) we get
t1 = 6 sec , t2 = 4 sec