A man rides at the rate of 40km/hr. But stops 20minutes to change horses at the end of every 25th kilometer. How long will he take to go a distance of 200 kilometers?	Options:
A) 5hr B) 6hr 30min C) 8hr 10min D) 7hr 20min E) 9hr
speed of man = 40km/hr   number of rests = (200/25)-1= 
<gadget id="calculator">(200/25)-1</gadget>
<output>7</output>
7   time taken for the man= (200/40)+7*(20/60) = 7 hr 20 min   Answer is 7hr 20min
<result>D</result>
A man rides at the rate of 40km/hr. But stops 20minutes to change horses at the end of every 25th kilometer. How long will he take to go a distance of 200 kilometers?