The walking speed ratio of a and B is 9:7. If a and B set out from a and B and walk in opposite directions respectively, they will meet after 0.5 hours. If they walk in the same direction, how many hours will it take a to catch up with B?

The walking speed ratio of a and B is 9:7. If a and B set out from a and B and walk in opposite directions respectively, they will meet after 0.5 hours. If they walk in the same direction, how many hours will it take a to catch up with B?

Let the velocities be 9x and 7x respectively
Distance = (9x + 7x) × 0.5 = 8x;
So the time in the same direction = 8x (9x-7x) = 4 hours
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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, how many hours will it take a to catch up with B

In three hours a overtook B