A man rides at the rate of 50km/hr. But stops 20minutes to change horses at the end of every 25th kilometer. How long will he take to go a distance of 100 kilometers?
Choose the most appropriate option:  A) 3hr  B) 6hr 30min  C) 8hr 10min  D) 7hr 20min  E) 9hr
speed of man = 50km/hr   number of rests = (100/25)-1= 
<gadget id="calculator">(100/25)-1</gadget>
<output>3</output>
3   time taken for the man= (100/50)+3*(20/60)= 
<gadget id="calculator">(100/50)+3*(20/60)</gadget>
<output>3</output>
3 hr   3hrnswer is 3hr
<result>A</result>
A man rides at the rate of 50km/hr. But stops 20minutes to change horses at the end of every 25th kilometer. How long will he take to go a distance of 100 kilometers?