Question

A man is 20 min late to the office , if he walks at 20kmph and he is 15 min early,if he walks at 30kmph. By how much time he will be late/early if he walks with 25kmph

Answer 1

Hey,

let distance be x,then

time1= x/20*60,

t2=x/30*60

difference b/w both time is 35min then

x/20-x/30=35 so x=35

now for 25kmph

35/25*60= 84 min

for 20kmph time=105 min

for 30kmph time= 70min

in 30 kmph he is early by 15 min then actual time is 85 min

so the answer is he is early by 1 min

ans=early 1 min

t=35/25*60

t=84

HOPE IT HELPS YOU:-))

Answer 2

let distance be x,then

time1= x/20*60,

t2=x/30*60

difference b/w both time is 35min then

x/20-x/30=35 so x=35

now for 25kmph

35/25*60= 84 min

for 20kmph time=105 min

for 30kmph time= 70min

in 30 kmph he is early by 15 min then actual time is 85 min

so the anser is he is early by 1 min

ans=early 1 min