p5avillieharolly p5avillieharolly

02-09-2016
Mathematics

contestada

The first stage of a rocket burns 28 seconds longer than the second stage. If the total burning time for both stages is 152 seconds then how long does each stage burn? Solve.

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HomertheGenius HomertheGenius

07-09-2016

The 1st stage: x, the 2nd stage: y.
x + y = 152
x = y + 28
y + 28 + y = 152
2 y = 152 - 28
2 y = 124
y = 124 : 2 = 62
x = 62 + 28 = 90
Answer: the first stage burns 90 seconds and the second burns 62 seconds.

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