Question

84. A car driver completes 180 kmps trip in
4 hours. If he averages 50 km/hr during
the first 3 hrs of trip, what is the speed
in the final hour?
(A) 44 km/hr
(B) 45 km/hr
(C) 35 km/hr
(D) 30 km/hr​

Answer 1

Answer:

(D)30km/hr

Step-by-step explanation:

180km in 4 hours in total

50km/h for 3hours=150km in 3 hours at 50km/h

remaining distance=180-150=30km

ie., 30km in last hour at 30km/h