Question
Download Solution PDFजब घन की भुजा 10 cm है तो घन के आयतन के परिवर्तन की दर ज्ञात कीजिए। यह ज्ञात है कि भुजा 4 cm/s की दर से बदलती है।
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFअवधारणा:
एक चर t के संबंध में फलन f(x) के मान के परिवर्तन की दर \(\rm \frac {df(x)}{dt}\) निम्न द्वारा दी गई है:
गणना:
दिया गया है घन की भुजा = 10cm और \(\rm dL\over dt\) = 4 cm/s
अब घन का आयतन V = L3
\(\rm dV\over dt\) = \(\rm dV\over dL\) × \(\rm dL\over dt\)
\(\rm dV\over dt\) = \(\rm dL^3\over dL\) × 4
\(\rm dV\over dt\) = 3L2 × 4
\(\rm dV\over dt\) = 12 × 102
\(\rm dV\over dt\) = 1200 cm3/s
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