Question Number 204374 by mr W last updated on 14/Feb/24
Commented by mr W last updated on 15/Feb/24
$${The}\:{radius}\:{of}\:{the}\:{big}\:{sphere}\:\left({say}\:\right. \\ $$$$\left.{the}\:{Earth}\right)\:{is}\:{R}\:{and}\:{the}\:{radius}\:{of} \\ $$$${the}\:{small}\:{sphere}\:\left({say}\:{theMoon}\right)\:{is}\:{r}. \\ $$$${find}\:{the}\:{maximum}\:{area}\:{of}\:{the} \\ $$$${shadow}\:{which}\:{the}\:{Moon}\:{casts}\:{on}\: \\ $$$${the}\:{Earth}. \\ $$