Respuesta :
felix- 3 in 20 min, 9 in one hour, 18 in two hours.
his brother- 2 in 30 min, 4 in one hour, 8 in two hours.
18+8=26
answer=26
his brother- 2 in 30 min, 4 in one hour, 8 in two hours.
18+8=26
answer=26
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