Three persons are walking from a place A to another place B. Their speeds are in the ratio of 4 : 3 : 5. The time ratio to reach B by these persons will be :
[A] 4 : 3 : 5
[B] 5 : 3 : 4
[C] 15 : 9 : 20
[D] 15 : 20 : 12
Ans: D
we need ratio''s time
time = distance/velocity
let the distance be x
and they have given ratio''s of velocities as 4:3:5
Now the ratio''s of time to reach B from A is x/4:x/3:x/5
1/4:1/3:1/5
15:20:12
The answer for this question is D.
We know that time=distance/speed.Three persons walk same distance.Therefore time=1/speed.
(1/4):(1/3):(1/5)=(60/4):(60/3):(60/5)=15:20:12
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