Answer
$30t^4*\sqrt {3}$
Work Step by Step
$6*\sqrt {5t^3}*\sqrt {15t^5}$
$6*\sqrt {5t*t^2}*\sqrt {3*5t*t^4}$
$6*\sqrt {5t*t^2*3*5*t*t^4}$
$30*\sqrt {t*t^2*3*t*t^4}$
$30t^4*\sqrt {3}$
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