Two planes took off to meet each other, the distance between them is 240 km. and met at an intermediate airfield 4 hours later.
| July 3, 2021 | education
Two planes took off to meet each other, the distance between them is 240 km. and met at an intermediate airfield 4 hours later. What is the speed of the second plane if the speed of the first is 350 km / h.
It is known from the problem statement that the distance between the aircraft is 240 kilometers. They met after 4 hours, the speed of the first is 350 km / h. Let’s solve this problem using the equation.
Let x be the speed of the second plane.
The total distance between them is 240 kilometers.
Let’s compose and solve the equation.
350 * 4 + 4x = 240;
1400 + 4x = 240;
4x = 1400 – 240;
4x = 1160: 4;
x = 290 (km / h) – the speed at which the second plane flew.
Answer: the total speed at which the second plane flew is 290 km / h.
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