Ajet flew from montreal to san francisco, a distance of 4000km. on the return trip the speed was increased by 10km/h. if the total trip took 13h, what was the speed from montreal to san francisco?

answer:

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this is an rtd problem. we can create a table based on the given information

jet . . . rate . . . . . time . . . . . . . . distance

m-> s . . r . . . . . . 4000/r . . . . . .. . . 4000

s-> m . . r + 300 . . . .4000/(r + 300) . . . .. .4000

totals . . . . . . . . . . .13

so, from the table, we get

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step-by-step explanation: