Question

Walking at 3/7th part of his usual speed, a man will reach his office at 9:06 am instead of 8:50 am. What is the usual time taken by him to reach his office (in minutes)?

Answer 1

Answer:

12min

Explanation:

Usual speed :s

d=st

3/7th part of speed : 3/7s

d=3/7s(t+16/60)

st=3/7s(t+16/60)

(7st-3st) /7=48s/420

20t=4

t=4/20

t=1/5(hr)

t=12min