Complete question :
The speed that a tsunami can travel is modeled by the equation s = 356 StartRoot d EndRoot, where S is the speed in kilometers per hour and d is the average depth of the water in kilometers. A tsunami is traveling at 140 km/hr. What is the approximate average depth of the water? 0.133 km 0.145 km 0.155 km
Answer:
0.155 km
Explanation:
Given the tsunami speed relation :
S = 356√d
Given a tsunami speed of 140/hr
s = 140km/hr
S = 356√d
Make d the subject
Divide both sides by 356
s / 356= √d
Hence,
140 / 356 = √d
0.3932584 = √d
Square both sides
0.3932584² = d
d = 0.1546 km
d = 0.155 km