Question
When the radius of a circle is increased by 1 cm, its
area increases by 22 cm². What was the original radius of the circle?Solution
Let the radius of the circle be r cm new radius of the circle = (r + 1) As we know, Area of the circle = πr² According to the question - π (r + 1) ² – πr² = 22 π [ r+ 1)2-r2] = 22  (22/7) [r² + 1 + 2r - r² ] = 22  (1 + 2r) = 7 2r = 7-1 r = 6/2 r = 3 cm.
How many persons sitting between D and C?
Who among the following stands third to the right of H?
Which one of the following combination is false?
If Z is at extreme right end, then how many persons are sitting Z and H?
Which of the following statement is correct?
If O sits third to the right of F then how many persons are sitting between O and J?
Which of the following is true?
How is U related to Q?
What is the position of O with respect to D?
How many seats are between M and S when counted from the left of S?
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