NCERT Solutions for Class 8 Maths Chapter 10 Exponents and Powers Ex 10.2 are the part of NCERT Solutions for Class 8 Maths (Rationalised Contents). Here you can
find the NCERT Solutions for Class 8 Maths Chapter 10 Exponents and Powers Ex 10.2

**.****NCERT Solutions for Class 8 Maths Chapter 10 ****Exponents and Powers**** Ex 10.2**

**Ex 10.2 Class 8 Maths Question 1.**

### Express the following numbers in standard form.

**(i)** 0.0000000000085

**(ii)** 0.00000000000942

**(iii)** 6020000000000000

**(iv)** 0.00000000837

**(v)** 31860000000

**Solution:**

**Ex 10.2 Class 8 Maths Question 2.**

### Express the following numbers in usual form.

**(i)** 3.02 × 10^{-6}

**(ii)** 4.5 × 10^{4}

**(iii)** 3 × 10^{-8}

**(iv)** 1.0001 × 10^{9}

**(v)** 5.8 × 10^{12}

**(vi)** 3.61492 × 10^{6}

**Solution:**

**Ex 10.2 Class 8 Maths Question 3.**

### Express the number appearing in the following statements in standard form.

**(i)** 1 micron is equal to 1/1000000 m.

**(ii)** Charge of an electron is 0.00000000000000000016 coulomb.

**(iii)** Size of a bacteria is 0.0000005 m.

**(iv)** Size of a plant cell is 0.00001275 m.

**(v)** Thickness of a thick paper is 0.07 mm.

**Solution:**

**Ex 10.2 Class 8 Maths Question 4.**

### 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?

**Solution:**

Given: Thickness of each book = 20 mm

∴ Thickness of 5 books = 5 × 20 mm = 100 mm

Thickness of 1 sheet of paper = 0.016 mm

Thickness of 5 sheets of paper = 5 × 0.016 mm = 0.08 mm

Total thickness = 100 mm + 0.08 mm

= 100.08 mm = 1.0008 × 10^{2} mm

Related Links:

**NCERT Solutions for Maths Class 9**

**NCERT Solutions for Maths Class 10**

**NCERT Solutions for Maths Class 11**