Walking at 25% of his usual speed a man takes 24 minutes more to cover a distance. What is his usual time to cover this distance? Choose the correct option.
A) 8 B) 16 C) 42 D) 48 E) 54
speed is inversly proprtional to time   walking at 25% of speed meand 1/4s takes 4t.   It takes 24 minutes extra to cover the distance. then   4t=t+24   3t=24   t=8.   Option 8 is correct
<result>A</result>
Walking at 25% of his usual speed a man takes 24 minutes more to cover a distance. What is his usual time to cover this distance?