Question: Jessica's family is 300 km away from New York. If they are traveling at the rate of 50 km/h and stop to rest for 30 minutes every 2 hours, how long will it take them to reach New York? Think carefully first, then make a decision:
Without stopping to rest they will arrive in 300 / 50 = 6 hours. They need to stop to rest after every 2 hours except for the last 2 hour stretch of time, which is when they reach New York, so they rest (6 / 2) - 1 = 3 - 1 = 2 times. The time they spend resting is 2 * 30 = 60 minutes or 1 hour. So they will arrive in 6 + 1 = 7 hours. So the answer is 7.