Two cyclist start from the same places in opposite directions. One is going towards north at 30kmph and the other is going towards south 40kmph. What time will they take to be 50km apart? Options: A) 1.32hr B) 0.714hrs C) 3.231hrs D) 0.515hrs E) 6.214hrs
To be (30+40) km apart, they take 1 hour   To be 50 km apart, they take 1/70 *50 = 0.714 hrs   Answer is 0.714hrs
<result>B</result>
Two cyclist start from the same places in opposite directions. One is going towards north at 30kmph and the other is going towards south 40kmph. What time will they take to be 50km apart?