IBPS Clerk Mains 2015 Paper

(a) Given that the length of the rectangular field l = 90 mand breadth b = 80 m.
Then its area lb = 90 × 80 sq.m
We know that the area of square =(

1

2

)×(diagonal)2
from the given question, we have area of square plot =area of rectangular field
That is,90x80=

1

2

×(diagonal)2
(diagonal2)=2×7200=14400=(120)2
diagonal = 120 m.