81 3 Passenger cars and freight cars start from both places at the same time and travel in opposite directions. The passenger cars travel 35 kilometers per hour, which is 5 / 7 of the speed of freight cars. After 3.5 hours, the two cars meet. How many meters is the distance between the two places?

81 3 Passenger cars and freight cars start from both places at the same time and travel in opposite directions. The passenger cars travel 35 kilometers per hour, which is 5 / 7 of the speed of freight cars. After 3.5 hours, the two cars meet. How many meters is the distance between the two places?

35 * 3.5 + 5 / 7 of 35 * 3.5 = 294km