A man rides at the rate of 30km/hr. But stops 30minutes to change horses at the end of every 25th kilometer. How long will he take to go a distance of 150 kilometers? Choices
A) 5hr
B) 7hr 30min
C) 8hr 10min
D) 7hr 20min
E) 9hr
speed of man = 30km/hr   number of rests = (150/25)-1= 
<gadget id="calculator">(150/25)-1</gadget>
<output>5</output>
5   time taken for the man= (150/30)+5*(30/60) = 7 hr 30 min   Answer is 7hr 30min
<result>B</result>
A man rides at the rate of 30km/hr. But stops 30minutes to change horses at the end of every 25th kilometer. How long will he take to go a distance of 150 kilometers?