A train leaves Paris at 2:00 PM. Another leaves Berlin at 3:30 PM. That’s 1.5 hours later. In that time, the Paris train travels 90 km/h × 1.5 h = 135 km. So the remaining distance when the Berlin train starts is 1050 – 135 = 915 km. Their combined speed is 90 + 120 = 210 km/h. Time to meet after 3:30 PM = 915 ÷ 210 = 4.357 hours. That’s 4 hours and 21.4 minutes. Add to 3:30 PM…
And that was enough.
“The ratio of primes to squares on the safe bridge is 3:2,” said the Curator. “There are 15 primes. How many squares?”
He hadn’t beaten the numbers. But for one night, he had told their story.
He stared at Question 7. “A train leaves Paris at 14:00, traveling at 90 km/h. Another train leaves Berlin at 15:30, traveling at 120 km/h. The distance between Paris and Berlin is 1050 km. At what time do they meet?” Leo’s eyes glazed over. He typed “11:47 PM” as a joke. The screen buzzed red.
A train leaves Paris at 2:00 PM. Another leaves Berlin at 3:30 PM. That’s 1.5 hours later. In that time, the Paris train travels 90 km/h × 1.5 h = 135 km. So the remaining distance when the Berlin train starts is 1050 – 135 = 915 km. Their combined speed is 90 + 120 = 210 km/h. Time to meet after 3:30 PM = 915 ÷ 210 = 4.357 hours. That’s 4 hours and 21.4 minutes. Add to 3:30 PM…
And that was enough.
“The ratio of primes to squares on the safe bridge is 3:2,” said the Curator. “There are 15 primes. How many squares?” sparxmatgs
He hadn’t beaten the numbers. But for one night, he had told their story. A train leaves Paris at 2:00 PM
He stared at Question 7. “A train leaves Paris at 14:00, traveling at 90 km/h. Another train leaves Berlin at 15:30, traveling at 120 km/h. The distance between Paris and Berlin is 1050 km. At what time do they meet?” Leo’s eyes glazed over. He typed “11:47 PM” as a joke. The screen buzzed red. In that time, the Paris train travels 90 km/h × 1