भुजा (x+2y+3z) वाले वर्ग के मॉडल में (yz) वाले आयतों का संयुक्त क्षेत्रफल क्या होगा?
In the square model of side (x+2y+3z), what is the combined area of the rectangles containing (yz)?
Explanation opens after your attempt
B. (12yz)
Concept
Two rectangles from (2y) and (3z) appear, so \(2\cdot 2y\cdot 3z=12yz\). Exam tip: count pairwise rectangles in a three-part square.
Why this answer is correct
The correct answer is B. (12yz). Two rectangles from (2y) and (3z) appear, so \(2\cdot 2y\cdot 3z=12yz\). Exam tip: count pairwise rectangles in a three-part square.
Exam Tip
(2y) और (3z) के दो आयत मिलते हैं इसलिए \(2\cdot 2y\cdot 3z=12yz\)। परीक्षा में तीन भागों वाले वर्ग में जोड़ीदार आयत गिनें।
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