Car travels first 30 kilometre with a uniform speed of 60 km per hour and then next 30 km with a uniform speed of 40 km per hour find the total time of the journey e
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Let the time taken by car to complete it's journey = T
S = 30km
u = 60km/h
time ( t1) = S/ub
= 30/60 = 0.5 h
Case 2
s = 30 km
u = 40 km/h
time (t2) = s/u
= 30/40 = 0.75 h
Total time T = t1 + t2
= 0.5 + 0.75 = 1.25 hrs
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