Question 83
Station master decides that the length and the breadth of the rectangular Digital Board is increases by 6% and decreases by 6% respectively. Find the overall change in the area
Solution
Let the length and breadth of rectangle be 100 cm
=> Original area = $$100\times100=10000$$ $$cm^2$$
Increasing the length by 6%, => new length = $$100\times\frac{106}{100}=106$$ cm
Similarly, new breadth = $$94$$ cm
=> New area = $$106\times94=9964$$ $$cm^2$$
$$\therefore$$ Area is decreased by = $$\frac{10000-9964}{10000}\times100=0.36\%$$
=> Ans - (C)
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