a= 6,75 dm
b= 6,75 * 2 = 13,5 dm
Ob = 2a+2b
Ob= ( 2* 6,75)+( 2* 13,5)=13,5+27=40,5 dm
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a= 6,75 dm
b= 6,75 * 2 = 13,5 dm
Ob = 2a+2b
Ob= ( 2* 6,75)+( 2* 13,5)=13,5+27=40,5 dm