Two cyclist start from the same places in opposite directions. One is going towards north at 10kmph and the other is going towards south 10kmph. What time will they take to be 50km apart? Choose one
A) 1.2hr B) 2.5hrs C) 3hrs D) 5.2hrs E) 6hrs
To be (10+10) km apart, they take 1 hour   To be 50 km apart, they take   1/20*50= 
<gadget id="calculator">  1/20*50</gadget>
<output>5/2 = around 2.5</output>
2.5 hrs   Answer is 2.5hrs
<result>B</result>
Two cyclist start from the same places in opposite directions. One is going towards north at 10kmph and the other is going towards south 10kmph. What time will they take to be 50km apart?