Question 108888
d=st d=distance t=time s=speed
360=s(t+2)
s=360/(t+2)
.
250=st
s=250/t
.
360/(t+2)=250/t
360t(t+2)/(t+2)=250t(t+2)/t
360t=250(t+2) no more fractions.
360t=250t+500
360t-250t=250t-250t+500
110t=500
110t/110=500/110
t=50/11 hrs
250/(50/11)
=250*11/50
=55 mph
Always check:
55*50/11=250 true
.
Ed