tolong jawab 24 dan 25 lh beserrta caranya

24. R = 70 ÷ 2

= 35 cm

L = phi × r^2

= 22/7 × 35^2

= 22/7 × 1.225

= 22 × 175

= 3.850 cm^2 (C)


25. L1 = S × S

= 14 × 14

= 196 cm

L2 = phi × r^2 / 2

=22/7 × 14^2/2

= 22/7 × 7^2

= 22/7 × 49

= 22 × 7

= 154 cm

L. gabungan = 196 + 154 = 350 cm^2 (B)