The length l, width w and height h of a box change with time. At a certain instant the dimensions are 
and 
, and l and w are increasing at a rate of 10 m/s while h is decreasing at a rate of 1 m/s. At that instant find the rates at which the surface area is changing.
Definitions:
Flat Spots
Areas of a tire that have become worn or damaged due to prolonged stationary pressure or sudden braking.
Trailer Tires
Specialized tires designed to bear heavy loads and endure the stresses associated with towing trailers.
Unbalanced Braking
A condition in a vehicle's brake system where the brakes do not apply evenly across all wheels, leading to decreased control and safety.
Trailer Service Braking
The braking system specifically designed for the controlled slowing or stopping of a trailer.
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