Walking at 40% 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 choice.
A) 16
B) 36
C) 42
D) 48
E) 54
speed is inversly proprtional to time   walking at 40% of speed meand 2/5s takes 5/2t.   It takes 24 minutes extra to cover the distance. then   5/2t=t+24   5t=2t+48   3t=48   t=16.   Option 16 is correct
<result>A</result>
Walking at 40% of his usual speed a man takes 24 minutes more to cover a distance. What is his usual time to cover this distance?