Question

A rectangle has dimensions 10 mx 25 m
If the length and breadth are increased by
15%, find the % increase in its area​

Answer 1

Step-by-step explanation:

Length = 10 m

Breadth = 25 m

Area = 250 m^2

New Length = 10 + 15% of 10

= 10 + 1.5

= 11.5

New Breadth = 25 + 15% of 25

= 25 + 3.75

= 28.75

New area = New Length × New Breadth

= 11.5 × 28.75

= 330.625

% increase = [(New area - Old area) / Old area] × 100

=> [(330.625 - 250)/250] × 100

= 80.625×2/5

= 16.125 × 2

= 32.25% increase in area

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