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The walking speed ratio of Party A and Party B is 7:5. They set out from ab at the same time. If they are walking in opposite directions, they will meet in 0.5 hours, If they go in the same direction, a will catch up with B in a few hours
(7 + 5) × 0.5 × (7-2) = 1.2 hours
The ratio of walking speed between a and B is 7:5. A and B start from a and B at the same time. If they walk in opposite directions, they will meet in 0.5 hours. If they walk in the same direction, then a needs to catch up with B______ Hours
Let a catch up with B after X hours. According to the meaning of the question, we can get the equation: 7x-5x = (7 + 5) × 0.5, & nbsp; & nbsp; & nbsp; 2x = 6, & nbsp; & nbsp; & nbsp; X = 3. A catches up with B after 3 hours
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