Answer:
hope you can understand
V = D/t = 10 / 20 = 0.5 mile per min
V = D/t = 20/30 = (2/3) mile per min
V = D/t = (10+20)/ 50 = (3/5) mile per min
45.4
Step-by-step explanation:
Nx2=90.8
Divide both sides by 2
N=45.4
C 12.5cm is the answer good luck