A journey of 540 km is completed in 7 hours 30 minutes. If two-third of the journey is completed at 80 km/hr, at what speed is the remaining journey completed ?
60 km/hr.
30 km/hr.
20 km/hr.
40 km/hr.
A
30 km/hr.
B
40 km/hr.
C
60 km/hr.
D
20 km/hr.
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Solution
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540 km journey takes 7 hours 30 minutes.
Two -Third of the journey =23×540=360 km
Time taken =36080=4 hours 30 minutes.
Remaining time =7−4=3 hours
Remaining Distance =540−360=180 km
Speed =1803=60 km/hr
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