Question 328438
D=RT
TRAIN A: 230=(R-8)T
T=230/(5-8)
TRAIN B: 270=RT
T=270/R
230/(R-8)=270/R CROSS MULTIPLY.
270(R-8)=230R
270R-2,160=230R
270R-230R=2,160
40R=2,160
R=2,160/40
54 MPH FOR TRAIN B.
PROOF:
230/(54-8)=270/54
230/46=270/54
5=5