asolokoagatha asolokoagatha

16-08-2021
Mathematics

contestada

perimeter is 21cm Length is 7.5cm and the Breadth is not given

Respuesta :

sledgehammer08 sledgehammer08

16-08-2021

Answer:

The answer is 3cm

Please give branliest!

Step-by-step explanation:

(S1×2)+(S2×2)=21cm

(S1+S2)×2=21cm

S1+S2=21÷2

7.5+S2=10.5

S2=10.5-7.5

S2=3

Breadth=3cm

Answer Link

gracie9779 gracie9779

16-08-2021

Step-by-step explanation:

p=2(l+b)

21=2(7.5+b)

21=15+2b

21-15=2b

6=2b

6/2=b

b=3

Answer Link

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