If the length of a rectangle is increased by 10% and its breadth is decreased by 10%, the change in its area will be

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Question:

If the length of a rectangle is increased by 10% and its breadth is decreased by 10%, the change in its area will be

A1% increase

B1% decrease

C10% increase

DNo change

Answer:

B. 1% decrease

Explanation:

1% decrease Required change in area =(-10 X 10)/100= -1%

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ഒരു ടാങ്കിൽ 90 L മിശ്രിതം അടങ്ങിയിരിക്കുന്നു, അതിൽ 20% ആൽക്കഹോൾ ഉണ്ട്. 40% ആൽക്കഹോൾ അടങ്ങിയ ലായനി ഉണ്ടാക്കാൻ, അതിൽ ചേർക്കേണ്ട ആൽക്കഹോളിന്റെ അളവ്?