. A rectangle is 8 cm long and 5 cm wide.
Its perimeter is doubled when each of
its sides is increased by xcm. What is
the new length of the rectangle?
[A] 6.5 cm 7 Xan
[B] 14.5 cm
[C] 8 cm
torto
[D] 11.5 cm
Answers
Answered by
1
Answer:
14.5Cm
Step-by-step explanation:
Perimeter of rectangle =2(l+b)
=2(8+5)cm=26cm
New length =(8+x)cm
New Breadth =(5+x)cm
Given 2(8+x+5+x)=26+2x
⇒2(13+2x)=52⇒13+2x=
2
52
=26
⇒2x=13⇒x=
2
13
=6.5cm
Therefore New Length =(8+6.5)cm
=14.5cm
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Answered by
1
14.5cm is the answer..........
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