A and B are walking with 25 kmph and 30 kmph. A is walking towards east and B is towards south. They both started at 7:00 A.M at what time they are 130 metres apart.  Pick:
A) 130m B) 140m C) 150m D) 160m E) 170m
let after t sec they are 130m apart then   (25* 5/18 *t)^2 + (30* 5/18 *t)^2 = 130^2   =&gt; t * (5/18) * 5 * √ 61 = 130   =&gt; t = 12.98425 sec ~ 13 sec   so, at 7:00:13 AM they are 130m apart.   130mNSWER:130m
<result>A</result>
A and B are walking with 25 kmph and 30 kmph. A is walking towards east and B is towards south. They both started at 7:00 A.M at what time they are 130 metres apart.