Amit travelled from A to B at an average speed of 80 km/h. He travelled the first 75% of the distance in two-third of the time and the rest at a constant speed of x km/h. The value of x is:
Show answer & explanation
Correct answer: D
Explanation
Correct Answer is option 4 i.e. 60
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Understanding |
Application |
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Average speed = 80 km/hr Suppose distance = x Time = x/80 |
Since first 75% of the distance in two-third of the time: Speed = 0.75x/(2x/240) = 90 km/hr Remaining time = x/240 Remaining distance = 0.25x Speed = 0.25x/(x/240) = 60 km/hr |