When the length and width of a rectangle are increased by 5 cm each, its area increases by 100 cm². However, if the length of the rectangle is increased by 1 cm and its breadth is decreased by 1 cm, then the area of the rectangle decreases by 6 cm².

What is the original area of the rectangle?

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The length of a rectangle is increased by a=30% and breadth is decreased by b=25% . What is the percentage change in the area of the rectangle?

The correct option is B 2.5% decreaseAnswer = option b Initial area =l×b Final area =1.3l×0.75b =0.975l×b % change =(1−0.975)×100=2.5% decrease

The length of a rectangle is increased by $a = 30 %$ and breadth is decreased by $b = 25 %$ . What is the percentage change in the area of the rectangle?

The correct option is B 2.5% decrease
Answer = option b

Initial area $= l \times b$

Final area $= 1.3 l \times 0.75 b$

$= 0.975 l \times b$

$%$ change $= (1 - 0.975) \times 100 = 2.5 %$ decrease