Can someone help me on the question??

sorry can't

step-by-step explanation:

i googled though and something came up but it was in science langueage not common english sooo

i think it would be 42cm

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