Answer:
6.0 ft (option C)
Step-by-step explanation:
Given:
The height of the tank = 10 ft
The width of the tank = 25ft
when the with of the tank is 15 ft, the height is unknown
To find:
the height of the water when the length across the water is 15ft
To determine the height, we will apply the similarity theorem:
The height of the water when the length across the water is 15ft is 6.0 ft (option C)