Additional practice Questions Mathematics standard CBSE Class -10

 1) The coordinates of the centre of the circle, O, and  a point on the circle, N, are shown in the figure below. 

What is the radius of the circle? 

(a)√0.4 units (b) 2 units (c) 4 units (d) √42.4 units

Ans: (b) 2 units

For Video explanation Click :

https://youtu.be/kdX8vne7mQU

2) Harsha made a wind chime using a frame and metal rods. She punched 8 holes in the frame, each 2 cm apart, and then hung 6 metal rods from the frame, as shown in the figure below. 

The ends of the metal rods are aligned over a line, shown by the 

dotted line in the figure. If all of the rods are straight and not 

swaying, then what is the length of Rod P ?

(a) 69/7cm  (b) 53/5cm  (c) 76/5cm  (d) 111/7 cm

Ans :(d) 111/7  cm

For Video explanation Click :

https://youtu.be/VUwJU29_B0s

3)In the figure below, PQRS is a square.

What is the value of sin ∠SPT?
(a) 8/17             (b) 8/15  

(c) 15/17            (d) (cannot be found with the given information)

Ans : (a) 8/17

For Video explanation Click :

https://youtu.be/I2FjQ2Kol4w

5) A cuboid of base area P sq units is filled with water up to a height of Q units. A sphere of volume R cu units is dropped into the cuboid such that it is completely submerged. A representation of the submerged sphere is shown below.

Which of these represents the increase in the height of water?

(a)0 units  (b) R/P  units  (c) R units  (d) 𝑄+ R/P units

Ans: (b)  R/P units

For Video explanation Click :

https://youtu.be/gAzzdoQVEh0