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Assertion (A) : In the given figlure, ABCD is a ||gm in which `DEbotAD and BF bot AD`. If AB = 16 cm, DE = 8 cm and BF = 10 cm then what is the length of AD?.A. Both Assertion (A) and Reason (R ) are true and Reason (R ) is a correct explansion of Assertion (A).B. Both Assertion (A) and Reason (R ) are true but Reason (R ) is not a correct explansion of Assertion (A).C. Assertion (A) is true and Reason (R ) is false.D. Assertion (A) is false and Reason (R ) is true. |
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Answer» Correct Answer - D Reason (R ) is clearly true. Area of ||gm `=Abxx DE =AD xx BF`. Let AD = x cm. Then, `16xx8=xx x xx10rArrx=(16xx8)/(10)=12.8 cm.` But, AD is 12 cm. `therefore` Assertion (A) is false. Thus, Assertion (A) is false and Reason (R ) is true. So, the correct answer is (d). |
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