A person covers a certain distance with certain speed if he increases his speed by 05km/hr then he reach 5 min early . Find the time taken by man with his initial speed , if his initial speed is 25 km/hr .
Answer & explanation
Correct answer: option 3
Initial speed = 25 km/hr
And speed increases by 5 km/hr ,
Increased speed = ( 25 + 5 ) km/hr= 30 km/hr
Ratio initial speed : increased speed
25 : 30
speed 5 : 6
time 6 : 5
( Distance = Speed × Time , so ratio of speed and time is inverse to each other )
According to question , ( 6 - 5 )R = 1R = 5 min
Time taken with initial speed = 6 × 5 = 30 min