Secondary School (English Medium) (5 to 8) कक्षा ८ - CBSE Question Bank Solutions

Express the number appearing in the given statement in standard form.

1 micron is equal to `1/1000000` m

Express the number appearing in the given statement in standard form.

Charge of an electron is 0.000, 000, 000, 000, 000, 000, 16 coulomb.

Express the number appearing in the given statement in standard form.

Size of a bacteria is 0.0000005 m

Express the number appearing in the given statement in standard form.

Size of a plant cell is 0.00001275 m

Express the number appearing in the given statement in standard form.

The thickness of a thick paper is 0.07 mm

In a stack, there are 5 books each of thickness 20 mm and 5 paper sheets each of thickness 0.016 mm. What is the total thickness of the stack?

Can a polyhedron have for its faces 3 triangles?

Can a polyhedron have for its faces 4 triangles?

Can a polyhedron have for its faces a square and four triangles?

Is it possible to have a polyhedron with any given number of faces? (Hint: Think of a pyramid).

The given Figure are prisms or not?

The given Figure are prisms or not?

The given Figure are prisms or not?

The given Figure are prisms or not?

How are prisms and cylinders alike?

How are pyramids and cones alike?

Is a square prism same as a cube? Explain.

Verify Euler’s formula for given solids

Verify Euler’s formula for given solids.

Using Euler’s formula, find the unknown.