Question

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Answer 1

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
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Answer 2

hey... Mate!! here's ur solution ➡

suppose, distance between A to B = x
and three persons speed are 4 x, 3 x and 5 x
resp.

then,

Time = dist / speed


hence,

required ratio = x / 4x : x/ 3x : x/ 5x

= 1/4 : 1/3 : 1/5

= 15: 20: 12


hope it might be helpful !!