Question
Length of a chord in a circle of radius 'r' cm, is 40 cm
and distance between chord and centre of the circle is 21 cm. Find the value of (2r + 1).Solution
AB is the chord of circle.
Perpendicular line joining the centre of circle and chord, bisects the chord.
i.e. AC = BC = (40/2) = 20 cm
By Pythagoras theorem,
OA 2 = OC 2 + AC 2
Or, r 2 = 21 2 + 20 2
Or, r 2 = 441 + 400
Or, r 2 = 841
So, 'r' = 29
But length cannot be negative. So, 'r' = 29
Required value = 2 X 29 + 1 = 59
Select the option that is related to the third number in the same way as the second number is related to the first number.
55 : 3136 :: 48 : ?8, 20, 48, 108, 232, 482
- Choose the pair of words which expresses the same relationship as
6 : 37 Select the option that is related to the third word in the same way as the second word is related to the first word.
Expand: Enlarge :: Condense: ?
From among the given alternatives select the one in which the set of numbers is most likely the set of numbers given in the question.
Given se...
Awful : Terrible :: Descent : ?
Statements: L > J > W = Z < H < V ≤ U; V > P > H ≥ C; I = V ≤ E
Conclusions:
I. I > W
II. U > Z
III. I ≤ E
...- Select the option that is related to the third term in the same way as the second term is related to first term and the sixth term is related to the fifth ...
In the following question, select the related word pair from the given alternatives.Â
Map: Geography
Drake : Duck : : Wizard : ?Â
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