Case of the Ad That Subtracts and Other True Math Mysteries for You to Solve

Case of the Ad That Subtracts and Other True Math Mysteries for You to Solve — page 3
Case CRACKED TIMING THE WAVES Every second counts when tsunamis approach To find out how long before the waves hit Tahiti first use the map Take a ruler and measure how far it is from the center of the earthquake zone to Tahiti It's about 2 inches The key on the map shows that 1 inch equals 2 000 miles So we multiply the number of inches by the number of miles to find the actual distance between the earthquake and the island 2 inches x 2 000 miles about 5 000 miles Next use the information in the weather report The report said the tsunami was traveling at a speed of 500 miles per hour Traveling at that speed how long will it take the tsunami to go 5 000 miles To find out divide the distance by the speed 5 000 miles 500 miles per hour 10 hours It will take 10 hours for the tsunami to reach Tahiti