GMAT Quantitative Reasoning Practice Test 7

Question : 55 of 100

Marks: +1, -0

Two giant identical poles have been planted in the ground. One of the poles was planted dipper than the other pole. The shadow of pole A is 10 meters long and the shadow of pole B is 8 meters long. How tall is pole B?
(1) Pole A is hoisted 14 meters in the air.
(2) Pole B is located 2 meters from pole

A. Statement (1) BY ITSELF is sufficient to answer the question, but statement (2) by itself is not.
Statement (2) BY ITSELF is sufficient to answer the question, but statement (1) by itself is not.
Statements (1) and (2) TAKEN TOGETHER are sufficient to answer the question, even though NEITHER statement BY ITSELF is sufficient.
Either statement BY ITSELF is sufficient to answer the question.
Statements (1) and (2) TAKEN TOGETHER are NOT sufficient to answer the question, requiring more data pertaining to the problem.

Validate

Solution:

The shadows are proportioned to their height.
Statement (1) gives us the height of pole A and so by using the proportion we can calculate the height of pole B. The proportions are

10{/}14 = 8{/}Hb

, from that we know the height of pole B. Statement (2) is insufficient because the distance between the poles is irrelevant to the question and it doesn’t contribute anything

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