pake cara yah kak 15 sampe 16 plis tolong dibantu jawab yang bnr

15) L1 = p × l
= 30 × 28
= 840 cm²
L2 = ½ × π × r²
= ½ × 22/7 × 14 × 14
= 308 cm²
Lttl = 840 + 308 = 1.148 cm² ( B )

16) L1 = ½ × a × t
= ½ × 32 × ( 52 + 48)
= ½ × 32 × 100
= 1.600 cm²
L2 = p × l
= 72 × ( 52 + 48)
= 72 × 100
= 7.200 cm²
L3 = p × l
= 52 × 48
= 2.496 cm²
Lttl = 1.600 + 7.200 + 2.496
= 11.296 cm² ( B )