Advait has to reach Kanpur which is 947 km away in 19 hours. His starting speed for 6 hours was 38 km/hr. For the next 70 km his speed was 35 km/hr. By what speed he must travel now so as to reach Kanpur in the decided time of 19 hours?
59 km/hr
Distance travelled in the first 6 hours = 38 km/hr × 6 hours = 228 km
Distance travelled in the next 70 km = 70 km
Remaining distance to cover = 947 km - 228 km - 70 km = 649 km
Remaining time = 19 hours - 6 hours (first part) - time taken for next 70 km = 19 hours - 6 hours - (70 km ÷ 35 km/hr) = 19 - 6 - 2 = 11 hours
Required speed = Distance ÷ Time = 649 km ÷ 11 hours = 59 km/hr
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