# Joint Champion!

Adrita & Ryne participated in a car race.

When the race started at point A -

The initial velocity of Adrita's car was $4 ms^{-1}$

The initial velocity of Ryne's car was $7 ms^{-1}$

The acceleration of Adrita's car was $0.5 ms^{-2}$

The acceleration of Ryne's car was $0.4 ms^{-2}$

They finished the race at the same time at point B .

What was the duration of the race in seconds ?

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