Question

Two private airplanes travel toward each other from cities that are 780 km apart at speeds of 190 km/h and 200 km/h. They left at the same time. In how many hours will they meet?

Answer 1

Answer on Question #43682 – Math - Algebra

Two private airplanes travel toward each other from cities that are 780 km apart at speeds of 190 km/h and 200 km/h. They left at the same time. In how many hours will they meet?

Solution.

The speed of convergence is $190 + 200 = 390\,\mathrm{km/h}$.

So, they will meet in $\frac{780\,\mathrm{km}}{390\,\mathrm{km/h}} = 2\,\mathrm{h}$.

**Answer**: 2 hours.

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