Question

two rectangular pieces of paper strip each if length 30cm and width 3cm are pasted at right angles to make the shape of a cross find the perimeter of the cross road

Answer 1

Bcz there have to strip so 2×66=132

Answer 2

Answer:

$\red { Perimeter \:of \: cross} \green { = 120\:cm }$

Step-by-step explanation:

$\underline {Dimensions \: of \: two \: rectangular \: pieces}$

$Length (l) = 30 \:cm \\Breadth (b) = 3 \:cm$

/* According to the problem given,

If two rectangular paper strips pasted at right angles to make the shape of a cross ,then it look likes above figure attached.

$Perimeter \:of \: cross \\= 2\times perimeter \:of \: a \: rectangle - perimeter of a square \: ABCD$

$= 2[2(l+b) ] - 4\times (side \: of \: ABCD )$

$= 2[ 2(30+3)] - 4\times 3$

$= 2( 2\times 33 ) - 12$

$= 2 \times 66 - 12 \\= 132 - 12 \\= 120 \: cm$

Therefore.,

$\red { Perimeter \:of \: cross} \green { = 120\:cm }$

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