A bike travels a distance of 200km at a constant speed. If the speed of the bike is increased by 5km. an hour, the journey would have taken 2 hours less. What is the speed of the bike?
A
30km/hour
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B
25km/hour
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C
20km/hour
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D
15km/hour
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Solution
The correct option is D20km/hour Let the speed be x km.p.h. ⇒200x−200x+5=2 ⇒x=20.