Nora and Eli are making a homemade spring rolls for a party. Nora can make a spring rolls in 10 minutes. Eli can make 10 spring rolls in 12 minutes. If they each make 40 Spring roll school finish first

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft