Question

Tolong di jawab ya. pake cara

Answer 1

Verified answer

Penyelesaian :
Panjang : Lebar = 7 : 4
K = 2 × ( p + l )
( p + l ) = 66 cm ÷ 2 = 33 cm

Panjang
= 7 / ( 7 + 4 ) × 33 cm
= 7 / 11 × 33 cm
= 21 cm

Lebar
= 4 / ( 7 + 4 ) × 33 cm
= 4 / 11 × 33 cm
= 12 cm

Luas persegi panjang
= p × l
= 21 cm × 12 cm
= 252 cm^2

Good Luck :)

Answer 2

Verified answer

Keliling persegi panjang
= 2 × ( p + l )
= 66 cm

Perbandingan p : l = 7 : 4
Jumlah perbandingan
= 7 + 4
= 11

Panjang
= 7/11 × ( 66 ÷ 2 )
= 7/11 × 33
= 21 cm

Lebar
= 4/11 × ( 66 ÷ 2 )
= 4/11 × 33
= 12 cm

Luas persegi panjang
= p × l
= 21 cm × 12 cm
= 252 cm2