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Linear Functions

SAT Math· difficulty 5/5

Tank starts at 100 L and gains 4 L/min. Another tank starts at 250 L and loses 1 L/min. Tanks have equal volume at t=?t = ? minutes:

  • A

    3030

    check_circle
  • B

    4040

  • C

    2525

  • D

    5050

Explanation

100+4t=250−t⇒5t=150⇒t=30100 + 4t = 250 - t \Rightarrow 5t = 150 \Rightarrow t = 30.

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