Verified Answer :

Taken time is from 11.00 am to 2.30 pm (14.30) = 14.30 - 11 = 3.30 hours

We know that D = S* T (D - distance, S - speed , T- time)

So, \(D= \frac{5km}{h}*3.5h=\boxed {17.5 hours}\)

Time taken = 14 : 30 - 11 :00 = 3.5 hrs
Speed = 5 km /hr
Distance = time speed 
= 3.5
 5 
= 17.5 km