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Sagot :

4h 30 min = 4.5 h

90 km => 1 h

90 * 2 = > 180 km => 2 h

90 * 4.5 => 405 km => 4 h 30 min

VIA100
a.
90 x 2 = 180
En 2h, il parcoure 180 km.

90 x 4,5 = 405
En 4h30, il parcoure 405 km.

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