In a race of 600 metres, A can beat B by 60 metres and in a race of 500 metres, B can beat C by 50 metres. By how many metres will A beat C in a race of 400 metres?  Pick one.
A) 76 metres B) 80 metres C) 70 metres D) 84 metres E) None
A runs	B runs	C runs   600 metres race	600m	540 m   500 metres race	500 m	450m   Combing ratio A runs B runs C runs   300metres - 2700meters - 2430metres   Unitary A runs B runs C runs   Method 400mtres - 360 metres - 324 metres   ? A beats C by  400-324= 
<gadget id="calculator"> 400-324</gadget>
<output>76</output>
76 metres.   76 metresnswer: 76 metres.
<result>A</result>
In a race of 600 metres, A can beat B by 60 metres and in a race of 500 metres, B can beat C by 50 metres. By how many metres will A beat C in a race of 400 metres?