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Linear Equations in One Variable

SAT Math· difficulty 5/5

Two trains 480 mi apart travel toward each other. Train A at 70 mph, Train B at 50 mph. If A leaves 1 hour earlier, how long after B leaves do they meet?

  • A

    3.53.5 h

  • B

    3412\frac{34}{12} h

    check_circle
  • C

    176\frac{17}{6} h

  • D

    4112\frac{41}{12} h

Explanation

A travels 70 mi in first hour. Remaining distance =410= 410 mi. Combined speed =120= 120 mph. Time =410/120=41/12≈3.42= 410/120 = 41/12 \approx 3.42 h. Closest answer: 4112\frac{41}{12} (index 1). Mark answer index 1.

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