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HELP!! URGENT

When they are both racing on hoverboards, Victoria is 3 times as fast as her brother Max. When she is on foot, she is 3 times slower than Max on his hoverboard. They took off on hoverboards at the same time, but after 12 minutes, Victoria’s hoverboard broke and she immediately started to run. If the race was a tie, how long, in minutes, did it last from start to finish?

Respuesta :

5naka

let velocity of Max is v, and total time t

at 12 mins

distance of Victoria = 3•12•v= 36v

distance of Max = 12v

after 12 mins

distance of Victoria = (t-12)v/3

distance of Max = (t-12)v

since the race was a tie, then

total distance of Victoria = total distance of Max

36v + (t-12)v/3 = 12v + (t-12)v

cancel v from both sides

36 + t/3 - 4 = t

algebraic manipulation

⅔ t = 32

t = 48 mins

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