The length of a rectangle is 1 cm more than its breadth. The diagonal is 29 cm . Find the area of the rectangle.

Options

A. `481cm^2`
B. `841cm^2`
C. `420cm^2`
D. `870m^2`

Answer

C

Explanation

1=(b+1)
and ` d=sqrt (1^2+b^2)=sqrt ((b+1)^2+b^2)=29`
`implies b^2+b=420 implies b=20`
Area=`therefore 1=21
`therefore 1xxb=420cm^2`