A man rides at the rate of 20km/hr. But stops 10minutes to change horses at the end of every 25th kilometer. How long will he take to go a distance of 175 kilometers?
Choose the correct choice from the following.
A) 9hr  B) 8 hr 30 min  C) 9hr 45min  D) 6hr 20min  E) 8hr 40min
speed of man = 20km/hr   number of rests = (175/25)-1= 
<gadget id="calculator">(175/25)-1</gadget>
<output>6</output>
6   time taken for the man= (175/20)+6*(10/60) = 9 hr 45 min   Answer is 9hr 45min
<result>C</result>
A man rides at the rate of 20km/hr. But stops 10minutes to change horses at the end of every 25th kilometer. How long will he take to go a distance of 175 kilometers?