The perimeter of a rectangle is 90 and its width is 10. What is its area?


a. 250
b. 900
c. 700
d. 350

Sol: Let L and W be the lenght width of the rectangle
Perimeter  = 90
2L + 2W  ‚Äč = 90
Given width is 10

Therefore, 2L + 2(10)  =  90
                 2L = 70
                 L  =  35

Area of rectangle  = LxW
                             = 35x 10
                            =  350


Hence Option D is the correct answer.

 

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d350
 
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