Unit test question 200101

1.  Find the value of ∠ BAC In given figure

           

2. The length of the common chord of two intersecting circles is 12 cm. If the diameters of the circles are 15 cm and 13 cm, then what is the distance (in cm) between their centers?

3. Two parallel chords are drawn in a circle of diameter 30 cm. The length of one chord is 24 cm and the distance between the two chords is 21 cm. The length of the other chord is 

4. A train is travelling at the rate of 45km/hr. How many seconds it will take to cover a distance of 4/5 km? 

5. Write a short essay on circle.