Question
A is trying to break a bulb by throwing balls at it. If
he hits the bulb 3 times in every 5 throws and bulb breaks 3 times out of 12 hits, then find the probability of A breaking the bulb.Solution
Probability of A hitting the bulb = 3/5 Probability of the bulb being broke on getting hit = 3/12 = 1/4 Probability of A breaking the bulb = (3/5) × (1/4) = 3/20
One chord of a circle is given as 18.5 cm. Then the radius (r) of the circle must be:
The area of a square is 3,600 cm². Find the area of a circle whose radius is (2/3)ᵗʰ of the side of the square. (Use π = 3.14)
Sum of diameter and circumference of a circle is 232 cm, the find area of circle.
Find the area of the sector of a circle with radius 14 cm and central angle 90°.
The area of a sector of a circle is 88cm² and the angle of the sector is 60º. Find the radius of the circle.
From an external point P, two tangents PA and PB are drawn to a circle with center O. If OP = 13 cm and the radius of the circle is 5 cm, find the lengt...
- A square has an area of 2,500 cm². Find the area of a circle whose radius is (2/5)ᵗʰ of the length of the square’s side. (Take π = 3.14)
In a circle, two chords AB & CD are produced at P which is outside the circle . If PA= 12 cm, AB= 10 cm , PC = 2 cm then find CD.
Two circles of radii 15 cm and 10 cm touch each other externally at a point A. PQ is the direct common tangent of those two circles of centers O ₁ and...
- Calculate the area of a circle whose radius is (7/8)ᵗʰ of the side of a square whose area measures 1,600 cm². (Take π = 3.14)
