Respuesta :

Step-by-step explanation:

Let Cost of 1m=x

SP of 45 m=45x

He gains CP of 15 m

He gains=15x

Gain%=Gain/CP×100

15x/45x×100

=100/3

[tex] \mathbf{ \red{ \huge{gain = 33 \frac{1}{3} \%}}}[/tex]

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