If the length Lem of rectangle and breadth Bcm be increased by 25 each find the difference between t...........

Quantitative Aptitude (RRB NTPC) Mensuration 2D

If the length (Lem) of rectangle and breadth (Bcm) be increased by 25% each, find the difference between the new and original areas of the rectangle.

3LB/2sq. cm

24LB/9 sq. cm

9LB/16 sq. cm

16LB/9 sq. cm

Original area = L x B = LB cm²

New length = L + L/4 = 5L/4 cm

New breadth = B + B/4 = 5B/4 cm

New area = (5L/4) x (5B/4) = (25/16)LB cm²

Difference between new area and

original area = (25/16)LB – LB = (9/16)LB cm²

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