Question
Length of a chord in a circle of radius 'r' cm, is 24 cm
and distance between chord and centre of the circle is 35 cm. Find the value of (6r - 80).Solution
AB is the chord of circle.
Perpendicular line joining the centre of circle and chord, bisects the chord.
i.e. AC = BC = (24/2) = 12 cm
By Pythagoras theorem,
OA 2 = OC 2 + AC 2
Or, r 2 = 35 2 + 12 2
Or, r 2 = 1225 + 144
Or, r 2 = 1369
So, 'r' = 37
But length cannot be negative. So, 'r' = 37
Required value = 6 X 37 - 80 = 142
Which of the following is the age of G?
Study the information and answer the given questions:
Eight persons live on different floors in the same building. The building has eight flo...
Which of the following combination is true?
Six persons T, U, V, W, X and Y live in a six storey building but not necessarily in the same order. The bottommost floor is numbered as 1st and the to...
Which of the following cuisine Tailor’s likes?
Which of the following items is contained in Box 5?
Who amongst the following lives on floor no. 3?
Who among the following lives on the bottommost floor?
Who doesn’t live in flat-B of their floors?
I. T
II. P
III. R
Who among the following attends the music class immediately after the one who has tuition in Ashok nagar?
Relevant for Exams:
