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Let height of the cylinder and radius of the cylinder =100 Then surface area of the cylinder=2×3.14×100×100 =62800 Now- When 25%decreased in radius =100×75/100=75 And 20%increase in height=100×120/100=120 Now surface area of the cylinder=2×3.14×75×120=56520 Change in curved surface area=62800-56520= 6280 decresed %decreased=6280/62800×100 =10% decreased Trick- To [m + n+ (m × n) /100] =-25+(20) +(-25×20)/100 =-25+20-5 =-30+20 = -10%
C is the father of G, who is the grandson of R. W is the only daughter of R. R has only two children and only one of them is married. O is the mother-in...
If A%B means A is the brother of B.
A#B means A is the wife of B.
A@B means A is the father of B.
A$B means A is the sister of B.
In a family, there are six members. L is the father of K. N is married to K. H is the daughter-in-law of N. N is not the father of T. T is the brother-i...
Who among the following is the mother of D?
If A is married to W, then how is W related to B?
Introducing a woman, a man said, 'Her sister’s mother is the only daughter of my grandmother.' How is the man related to this woman?
Who is the grandmother of V?
____ is father-in-law of ____.
Four of the following five are alike in a certain way and thus form a group as per the given arrangement. Which of the following does not belong to tha...
Which of the following statement(s) is/are true?
