If $m = 3, n = 7$ , evaluate
(iii) $(10 m)^{2}$ .

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Solution

Given: $(10 m)^{2}$ .

Substituting $m = 3$ in the given expression

$(10 m)^{2} = (10 \times 3)^{2}$

$= (30)^{2}$

$= 900$

Hence, the value of $(10 m)^{2}$ for $m = 3, n = 7$ is $900$ .

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