Question

pleaseeee answrrrrrr meee​

Answer 1

let the speed of x be x

let the speed of y be y

time taken by y=30/y

time taken by x = 30/x

30/y+3=30/x

(10+y)y=10/x

10x+xy=10y----------------------(i)

by multiplying 2 on both side

20x=20y-2xy

if speed of x is doubled=2x

time =30/2x

time taken by y=30/y

A/c,

30/2x+3/2=30/y

10/2x+1/2=10/y

(10+x)/2x=10/y

20x=10y+xy----------------------(ii)

20x=20y-2xy

adding

30y=xy

x=30.