tolong pake cara yang No 25 aja y makasih

L.1 = 1/2 x 10 x 28 =
1/2 x 280 =140 cm
L.2 = 140 cm
L.3 = 28 x 28 = 784 cm
=140 +140 + 784 = 1.064 cm
L.4 = 1/2 x 22/7 x 14 x 14 = 308 cm
= 1.064 cm - 308 cm = 756 cm ( c.)