Answer:
Explanation:
Let, the Speed of the water be 'x'
and the Radius be 'r'
Now, the speed of Water Varies inversely with the Radius
So, x ∝ 1/r
x = k/r -----------(i)
Here, k is the proportionality constant
Now,
Given that, x = 2.5 ft per sec
then, 30 ft,
So, from eq. (i)
2.5 = k/30
So, k = 75
Again From eq. (i)
x = 75/r
Now, if r = 3ft
then, x = 75/3
x = 25
Hence, Speed of the water (x) = 25 ft per sec.