The [application] tag is meant for questions about applications of mathematical concepts and theorems to a more practical use (e.g. real world usage, less-abstract mathematics, etc.)

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What is the speed with which the shadow of the horse move along the fence at the moment when it covers $1/8$ of the circle in km/hr?

A horse runs along a circle with a speed of 20 km/hr.A lantern is at the center of the circle.A fence is along the tangent to the circle at the point at which the horse starts.What is the speed with ...