My question is: Jack has a grove with 4 trees by 5 trees. It takes 6 minutes to clean each tree. He gets help to clean the trees so it only takes half as long. How many hours did he spend cleaning trees? Your thoughts:
There were 4 * 5 = 20 trees to clean. So it took 20 * 6 = 120 minutes. That is 120 / 60 = 2 hours. So he spent 2 / 2 = 1 hour cleaning. The final answer: 1.