SSAT Math Question 320: Answer and Explanation

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Question: 320

9. The region in the figure shown is divided by lines A, B, C, and D. The area between A and C is 20 square miles, between B and D is 35 square miles, and between C and D is 30 square miles. What is the area in square miles between A and B?

  • A. 5
  • B. 10
  • C. 15
  • D. 25

Correct Answer: C

Explanation:

The answer is C

Clearly label the distances on the figure. Notice that BC + CD = BD, so you can solve for BC: BC + 30 - 35, meaning BC = 5. Notice, as well, that AC + BC = AC, so you can solve for AB: AB + 5 = 20, meaning AB = 15.

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