- #1
jakealucard
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A man 1.8 m tall walks at speed of 10m/s towards a street lamp which is 7m above the ground. How fast is the length of the man's shadow decreasing?
My attempt:
Let the man's shadow and the lamp's length be l, and the distance be d and time be t. Given, dd/dt = 10.
I am supposed to find dl/dt.
dd/dt= dl/dt X dd/dl
So how do I find dd/dl?
My attempt:
Let the man's shadow and the lamp's length be l, and the distance be d and time be t. Given, dd/dt = 10.
I am supposed to find dl/dt.
dd/dt= dl/dt X dd/dl
So how do I find dd/dl?