Once you attempt the question then PrepInsta explanation will be displayed.

let the speed is a & b (b>a)

total distance =x

two equation will form

18.5/a=(x-18.5)/b (Deep end equation)

x=18.5(a+b)/a..................1

also,

x/b+45+10.5/b=x/a+45+(x-10.5)/a (swallow end equation)

x=10.5(a+b)/(2a-b).........2

equating 1 & 2

we get a/b=37/53

so, x=18.5*90/37=45

Login/Signup to comment