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Direct and Inverse Proportions — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSDirect and Inverse Proportions1 Mark
Question
If $x$ varies inversely as $y,$ then
$x$
$-$
$60$
$y$
$2$
$10$
✓

Answer

If $x$ varies inversely as $y,$
Solution: $xy = k ($constant$) (i)$
$x = 60$ and $y = 10$
$xy = 60 \times 10 = 600$
$k = 60$ when $y = 2,$ then from eq. $(i) x \times 2 = k$
$2x = 600$
$x = 300$

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