Question

Does addition and subtraction of basic algebric expressions.
Std-8
Time : 1 Hour
(L.O. - Learning Outcome)
Periodic Assessment Test
Mathematics
December-2020
Marks : 25
L.O.
Q-1
L.O.
Q-2
Do as directed.
1. Add ab-bc into bc-ca
2. Subtract (3x2 - 2x + 5xy - 7) from (8 - 9xy + 3x? - 5x)
Multiplies the terms using identities.
Multiply the following using appropriate identities.
3. (x + 7) (x + 7)
4. (3x + 1) (3x - 8)
(2)
dditic
y, sut
(3)
and
help
L.O. Calculates the area of polygons.
Q-3
Solve the sums.
5. The area of rhombus is 120 cm’ and one of the diagonals is 8 cm. Find the other
diagonal
The diagonal of a quadrilateral shaped field is 24 m and the remaining opposite
verticles are 8 m and 13 m. Find the area of the field.
L.O.
Verifies Euler's formula for different cubes. Finds the number of edge, face
and vertex, of cubes with the help of Euler's formula.
Q-4
Answer the following Questions.
7. Find the number of faces, edges and vertices of pyramid with square base. Verify
Euler's formula for it.
(5)
(1)
(2)
L.O. Finds the surface and volume of cube cuboid and cylindrical objects.
Q-5 Do as directed.
8. If the length of a cube is 2 cm then find the surface area of the cube?
9.
The length of cuboid is 6 cm, width 3 cm and height 1 cm, then find the volume of
cuboid.
10. If the radius of a cylinder is 14 cm and the height is 5 cm, then find the volume of
this cylinder. (T1 = 22)
(2)​

Answer 1

Answer:

the length of cuboid is 6cm