The speed of a tsunam in Km per hour can be found using r = under root of 4.4944d where d is the depth in meter. suppose the water depth is 8100 meter

a) How fast is the tsunami moving in Km per hour?

b) How long would it take a tsunami to travel 3000 Km if the water depth was a consistent 3000m?

Answer :
 
Given Speed of Tsunami r4.4944 d    km / hr                 , Where  d  = Water depth in meter 

a ) Speed of Tsunami when d  = 8100 m

r4.4944 × 8100

r36404.64

r3640464100

r91011625

r954 × 9545 × 5

r  = 9545

r = 190.8     km  /hr                            ( Ans )

b ) ​Speed of Tsunami when d = 3000 m

r = 4.4944 × 3000

r = 13483.2

r = 116 .117        km /hr
Distance covered  = 3000  km

We know 

Time  = DistanceSpeed

3000116.117

= ​25.836    hr                                  ( Ans )

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