Question
Length of a chord in a circle of radius 'r' cm, is 14 cm
and distance between chord and centre of the circle is 24 cm. Find the value of (4r - 60).Solution
AB is the chord of circle.
Perpendicular line joining the centre of circle and chord, bisects the chord.
i.e. AC = BC = (14/2) = 7 cm
By Pythagoras theorem,
OA 2 = OC 2 + AC 2
Or, r 2 = 24 2 + 7 2
Or, r 2 = 576 + 49
Or, r 2 = 625
So, 'r' = 25
But length cannot be negative. So, 'r' = 25
Required value = 4 X 25 - 60 = 40
Which of the following is an Adulterant for Coffee powder?
What will be the error degree of freedom for testing 5 varieties of wheat in Latin Square Design?
The maize is cultivated throughout the year in all states of the country for various purposes. Popcorn is
Foot and mouth disease is-
Ionosphere is present in
Elements which is available in alkaline pH is:
The mold used in the preparation of Soya sauce is:
Which state has the largest area and production of potato in India?
What is the primary purpose of seed storage?
Drought occurs due to mismatching of the cropping pattern in relation to rainfall
