nomer 1 dong ka. pake cara ya

KINEMATIKA
• GL

GLB
S = 10 km
t = 20 menit = 20/60 = ⅓ jam
v = __?
S' = 6 km → t' = __?

a][ Kecepatan
S = v t
v = S / t
v = (10 km) / ⅓ jam)
v = 10 × 3/1 km/jam
v = 30 km/jam ← jwb

b][ waktu tempuh
S' = v t'
6 = 30 t'
t' = 6/30
t' = 1/5 jam = 12 menit = 720 s ← jwb