Multiple choice question XXXIII — task. Science CBSE, Class 9.

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A body of mass

$m_1$ moving with a uniform velocity of

$40\ ms^{-1}$ collides with another or mass

$m_2$ at rest and then the two together begin to move with a uniform velocity of

$30\ ms^{-1}$ . The ratio of their masses (

$\frac{m_1}{m_2}$ ) is

$0.75$
$4$
$3$
$1.33$

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