JEE Main BPlanning Mathematics problem 1333: A rectangle has length 9 cm and breadth 12 cm. Find its area in cm².
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Area=9×12=108.
Practice India questions with answers and explanations.
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Area=9×12=108.
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By Vieta, root sum is the coefficient 27.
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(10+21)/2=15.5.
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Increase/base ×100 = 25%.
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13²+11²=290.
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Area=14×14=196.
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By Vieta, root sum is the coefficient 32.
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18²+13²=493.
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Area=2×16=32.
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By Vieta, root sum is the coefficient 22.
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(4+3)/2=3.5.
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Increase/base ×100 = 25%.