Surekha travels 10 km to reach her office . she walks 0.5 km on foot at a speed of 8 km ph to catch her charted bus which travels of a speed of 40 kmph.time taken by her to reach the office is:
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D = total distance traveled to reach the office = 10 km
consider the motion during walk
v = speed of surekha during walk = 8 km/h
d = distance traveled during walk = 0.5 km
t = time spent during walk
Time spent during walk can be given as
t = d/v
t = 0.5/8
t = 0.0625 h
consider the motion during travel by bus :
V = speed of bus = 40 km/h
d' = distance remaining to travel to reach office = D - d = 10 - 0.5 = 9.5 km
t' = time spent in traveling by bus
time spent in traveling by bus is given as
t' = d'/V
t' = 9.5/40
t' = 0.2375 h
Total time taken to reach the office is given as
T = t + t'
T = 0.0625 + 0.2375
T = 0.3 h
T = 0.3 x 60 minutes = 18 minutes
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