Question:One side of a rectangle is 8 metres long and its diagonal measures 17 metres. The area of the rectangle is : 

A `126 m^2` 
B `63 m^2` 
C `144.5 m^2` 
D `120 m^2` 

+ Answer
D 

+ Explanation
Other side` = sqrt((17)^2 - 8^2`

                 `= sqrt(289) - 64`

                 `= sqrt(225)`

                `= 15 m.`

:. Area `= (15 xx 8) m^2`

     `= 120 m^2`

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Irin Moni

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