Tolong dong nomer 25,pake cara ya!

L persegi panjang = p × l
= 50 × 15
= 750 cm

L lingkaran = phi × r kuadrat
= 3,14 × (50 - 10) 40 kuadrat
= 3,14 × 1600
= 5.024
= 5.024 ÷ 2 (karena digambar setengah lingkaran)
= 2.512 cm

~~~ = 750 + 2.512cm
= 3.262cm