請問這兩小題要怎麼算?謝謝!

es 人 ~ Ar Traffic Control An air traffic controller Spots two airplanes at the same altitude converglng to apoint as 負ey 各y at right angles to eachi GOther. One airplane IS 240 kilometers from fthe polnt and has a speed Qft /20 lometers per hour. The other js 320 kilometers from 世e polnft and has a speed of 960 kilometers per hour. (a) Atf what rate is the distance between the planes changing? 一2go 三衝 久- (5D) 本ow mucfh fime does tbe controller have to get one Of 鍋e alrplanes on a different tght path? 2ouoy 22. Advertising C CS引fcS

懇請大大的協助

拜託各位了🙇‍♀️🙇‍♀️🙇‍♀️

求解謝謝

求臟形r=a(1+cos theta)繞x軸旋轉的體積與表面積 thx

這題怎麼解

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