A long distance runner runs 8 laps of a 360 meters track everyday. His timings for four consecutive days are 78, 86, 79 and 77 minutes respectively. On an average, how many meters/minute does the runner cover?

Question: A long distance runner runs 8 laps of a 360 meters track everyday. His timings for four consecutive days are 78, 86, 79 and 77 minutes respectively. On an average, how many meters/minute does the runner cover?

Solution:
Total distance covered = (4 × 8 × 360) meters
= 11520 meters

Total time taken = (78 + 86 + 79 + 77) = 320 minutes

∴ Average speed = (Total distance ÷ Total time) m/min
= (11520 ÷ 320) m/min
= 36 m/min