next question need help to....thanks

Rumus keliling lingkaran 2 x [tex] \frac{22}{7} [/tex] x jari jari
= 2 x [tex] \frac{22}{7} [/tex] x 14
= 88

Semoga membnatu :D
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1. l trpesium= setengah x (20+16) x 5 = 90 m²
50cm x 50 cm = 2500 cm² = seperempat m²
1 m² = 4 lembar
90 x 4 = 360 lembar

2. l = 2[tex] \pi [/tex]14
= 88 cm²

3. l = pi r² = 616 m²
biaya = 616 x 200000 = 123.200.000
jwb = B