A person covers a certain distance with certain speed if he increases his speed by 04 km/hr then he reach 6 min early . Find the time taken by man with his initial speed , if his initial speed is 40 km/hr .
Answer & explanation
Correct answer: option 4
Initial speed = 40 km/hr
And speed increases by 4 km/hr ,
Increased speed = ( 40 + 4 ) km/hr= 44 km/hr
Ratio initial speed : increased speed
40 : 44
speed 10 : 11
time 11 : 10
( Distance = Speed × Time , so ratio of speed and time is inverse to each other )
According to question , ( 11 - 10 )R = 1R = 6 min
Time taken with initial speed = 11 × 6 = 66 min