Question

If $m=3,n=7$ , evaluate
(i) $12mn$.

Answer 1

Given : $12mn$

Substituting $m=3,n=7$, in the given expression

$12mn=12\times 3\times 7$

$=12\times 21$

$=252$

Hence, the value of $12mn$ for $m=3,n=7$ is $252$ .