(单词翻译:单击)
每日一题
Mathematics>Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
Mr. Bumble delivers newspapers to his community every week on the same route. During the first 2 weeks of delivering newspapers, he traveled a total of 100 blocks. Mr. Bumble delivers newspapers for 50 weeks each year. How many blocks does Mr. Bumble travel delivering newspapers in 1 year?
A.1 blockB.4 blocks
C.50 blocks
D.2500 blocks
答案和解析
答案:D
解析:
Choice D is correct. When delivering newspapers, Mr. Bumble travels 100 blocks every 2 weeks. This gives the ratio of 100 blocks to 2 weeks, which can be represented by the fraction 100 blocks/2 weeks.
Mr. Bumble delivers newspapers 50 weeks of the year. Therefore, 1 year of delivering newspapers = 50 weeks.
Let b be the number of blocks Mr. Bumble travels during one year or 50 weeks of delivering newspapers. To find the value of b, we can set up a proportion.
100 blocks/2 weeks equals b blocks/50 weeks
Now, use the proportion to solve for b.
Mr. Bumble travels 2500 blocks delivering newspapers in 1 year.