The anchors to reach the bottom of the lake are 250 seconds.
Solution:
v = d/t
t = d/v
t = 17.5 ft/0.07ft
t = 250 second
So, the time taken by the anchor to reach the bottom of the lake is 250 seconds. Hence, this is the required solution.
A saltwater pool sometimes called an underwater lake deep sea, or salt lake is a volume of salt water that collects in a depression on the ocean floor. A pool is a dense body of water with a salinity of three to eight times that of the surrounding sea. The lake's water comes from rain snow melted ice streams and seepage from groundwater. Most lakes contain fresh water.
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