Question 151180
651/(X+23)=490/X
651X=490(X+23)
651X=490X+11,270
651X-490X=11,270
161X=11,270
X=11,270/161
X=70 KMH FOR kIRK'S SPEED
70+23=93 KMH FOR rICHARDS SPEED.
PROOF:
651/93=490/70
7=7