Two boats sailed from one pier in opposite directions. The speed of one of them is 64 km / h, and the speed

| June 10, 2021 | education

Two boats sailed from one pier in opposite directions. The speed of one of them is 64 km / h, and the speed of the second makes up three quarters of the first speed. How many hours will the distance between the boats be 672 km

1.Let’s find the speed of the second boat if it is known that it is 3/4 of the speed of the first boat:
3/4 * 64 = 3 * 16 = 48 km / h.
2. Let us find the paths of the boats at time t, multiplying their speeds by the time it takes for them to sail so much that the distance between them becomes 672 km:
1 boat = 64t,
2 boat = 48t.
3. Adding the paths of the boats, we must obtain a distance equal to 672 km, then we write down the equation and find t:
64t + 48t = 672,
112t = 672,
t = 672/112,
t = 6 h.
Answer: in 6 hours the distance between the boats will be 672 km.



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