Question

Q5. The length of a rectan eis
twice its breadth. What is the
length, if the perimeter is 90
cm? *​

Answer 1

Answer:

$2(l + b) = 90 \\ let \: the \: breadth \: be \: x \\ 2(2x + x) = 90 \\ 2(3x) = 90 \\ 3 x = 90 \div 2 \\ 3x = 45 \\ x = 45 \div 3 \\ x = 15 \\ length \: is \: twice \: the \: breadth \: so \: length \: is \: equal \: to \: 15 \times 2 = 60$

length is equal to 60 cm

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