bantuin dong dengan caranya ......

trapesium besar =A
trapesium kecil = B

tA/tB =aA/aB
tA/14 = 40/20
tA= 14.40/20
tA = 28
.
bB/bA= aB/aA
bB/ 52 = 20/40
bB= 52.20/40
bB = 26

L kebun = (a+b).t/2
= (20+26).14/2
= 46.7
= 322m²

L trap A = (a+b).t/2
=(40+52).28/2
= 92.14
= 1288m²

L jalan = 1288-322
=966m²

smoga membantu,,,