L = 3.060 m2 t= . ...... m

diketahui
L = 3.060m²
a = 70 m
b = 100 m

ditanya
t....?

Jawab
L = ½ x (a+b) x t
3.060 = ½ x (70 + 100) x t
3.060 = ½ x 700 x t
t = 3.060 : 350
t = 8,74

semoga benar

t=L/a+b÷2
=3.060/100+70÷2
=100+70=170
=3.060/170=18
=18÷2=8m