Lizzy: Lola and Tara decide to race to the top of a 20 story building. Tara takes the elevator and Lola runs up the stairs. Lola can run up 1 story in 10 seconds. The elevator goes up a story in 8 seconds but stops for 3 seconds on every single floor. How long would it take for the slower one of Lola and Tara to reach the top floor?.
Me: Hmmm, let me think. I think this is the detailed solution:
Lola climbs 20 stories in 20 stories x 10 seconds / story = 200 seconds. Tara can go up the elevator in 8 seconds / story x 20 stories = 160 seconds without the stops at each floor. The elevator stops for 3 seconds on each floor for a total of 20 stories x 3 seconds / story = 60 seconds. In total it takes Tara 160 seconds + 60 seconds = 220 seconds to reach the top floor. Because 200 < 220 Lola wins. Final answer: 220.