Question

[10 poin]
A. awwal akan tiba tepat waktu
B. Awwal tiba 30 detik setelah kuliah dimulai
C. Awwal tiba 30 detik sebelum kuliah dimulai
D. Awwal tiba pukul 08.01
E. Awwal tiba tepat disaat kuliah dimulai

Answer 1

Verified answer

Jarak , Kecepatan

s = 3km

s1=1/3 awal = 1/3 x 3 km = 1km

v = 60km/jam = = 60 km/60 mnit = 1 km/menit

t1 = s/v = 1 menit

s2 = sisa perjalanan = 3- 1 = 2 km

V2 = V1 +(30 % + 2kmn/jam)

V2 = 60km/jam + (30% x V1 + 2km ./am)

V2 = (60 + 18 + 2) km/jam = 80km/jam = 80 km/60mnt

v2 = 4/3 km/menit

T2 = S2/V2 = 2 :(4/3) = 6/4 = 1,5 mnit

Lama = t1 +t2 = 1 + 1.5 = 2,5 mrit

tiba = Berangkat 07.58 + lama 2,5 menit

tiba = 07.58 + 0-.02. 30

tiba = 07.60. 30

tiba pkl = 08.00. 30"

(B)