If a person reduces his speed by 25% , he takes 28 min to reach his destination . Find the time taken by him to reach his destination if he increases his speed by 16.66% .
Answer & explanation
Correct answer: option 2
Speed is reduced by 25% = \(\frac{1}{4}\)
Ratio Initial : New
Speed 4 : 3
Time 3 : 4
According to question , 4R = 28 min
1R = 7 min
3R = 21 min ( initial time )
Speed is increases by 16.66% = \(\frac{1}{6}\)
Ratio initial : new
Speed 6 : 7
Time 7 : 6
We know initial time is 21 min . 7R = 21 min
1R = 3min
6R = 18 min