Question

Answer 1

a: \(C=\left(35+12\right)\cdot2=47\cdot2=94\left(cm\right)\)

b: \(C=\left(26+4\right)\cdot2=60\left(dm\right)\)

c: \(C=\left(1200+750\right)\cdot2=1950\cdot2=3800\left(m\right)\)

d: \(C=\left(12+20\right)\cdot2=64\left(dm\right)\)

Answer 2

a, 2(a+b)=91 cm 

b, 2(26+4) = 60 dm 

c, (1200+750)2 = 3900 m 

d, 2(12+20) = 64 dm