# Relative speed

two cars crossing each other at 50 kmph and 20 kmph as shown above?

what is the relative speed when they cross each other?

[email_link] http://solvemaths.in/relative-speed/Uncategorized11-12th,Graduate,Undergraduatetwo cars crossing each other at 50 kmph and 20 kmph as shown above?
what is the relative speed when they cross each other?

sanjay_w@excite.comSubscriberSOLVE - ΜΔΓΗŠ
Answer 70

ok Now tell me what if both the cars are driving in the same direction?

Still 70km

NO ! …someone tell me it will be 50-20 = 30Kmph.

Same direction [pmath size=8] V=V1-V2 [/pmath]

Opposite direction [pmath size=8] V=V1+V2 [/pmath]

where V is relative velocity.

70 kmph