Area of a square natural lake is 50 sq. kms. A driver wishing to cross the lake diagonally, will have to swim a distance of :
A. 10 miles
B. 12 miles
C. 15 miles
D. None of these
Answer: Option D
Solution(By Examveda Team)
Let the length of the diagonal be x kmThen,
$$\eqalign{ & \Rightarrow \frac{1}{2}{x^2} = 50 \cr & \Rightarrow {x^2} = 100 \cr & \Rightarrow x = 10\,{\text{km}} \cr & \Rightarrow x = \left( {\frac{{10}}{{1.6}}} \right){\text{miles}} \cr & \Rightarrow x = 6.25{\text{ miles}} \cr & \left[ {\because 1{\text{ mile}} = {\text{1.609 km}}} \right] \cr} $$
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D. 307200 m2
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D. 4.04%
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A. 16 cm
B. 18 cm
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D. Data inadequate
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The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is:
A. 40%
B. 42%
C. 44%
D. 46%
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