Mohan rides a cycle at 8 kmph. After every 10 km he rests for 20 minutes. He will cover 40 km in :
Answer: C. 6 hrs.
Time taken to vocer each 10 km. = 10/8 = 5/4 hrs = 1 hour 15 min. Rest required after every 10 km = 20 min. Hence, total tie taken = 1 hr 15 m + 20 m + 1 hr + 15 m + 20 m + 1 hr 15 min + 20 m + 1 hr 15 m = 6 hrs.