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180 = 26t-t3
180-26 = t-t3
154 = t-t3
154/3 = t2
51,3 = t2
setahu saya begini kak :)
dy/dt = 27-3t^2=0
3t^2=27
t^2=9
t=3s
jadi ymaks 27(3)-(3)^3
= 54m
kalogaksalahyahh