Respuesta :

shartara2301

Step-by-step explanation:

distance = 90 km

time = 3 hours 15 min

= 3+ 15/60 hours

= 3+ 1/4 hours

= 13/4 hours

speed = distance/ time

= 90/ (13/4)

= 90 * 4 /13

= 27.69 km/ hr

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