Board | CBSE |

Textbook | NCERT |

Class | Class 7 |

Subject | Maths |

Chapter | Chapter 8 |

Chapter Name | Comparing Quantities |

Exercise | Ex 8.3 |

Number of Questions Solved | 11 |

Category | NCERT Solutions |

## NCERT Solutions for Class 7 Maths Chapter 8 Comparing Quantities Ex 8.3

**Exercise 8.3 Class 7 Question 1.**

Tell what is the profit or loss in the following transactions. Also, find profit percent or loss percent in each case.

**(a)** Gardening shears bought for ₹ 250 and sold for ₹ 325.

**(b)** A refrigerator bought for ₹ 12,000 and sold at ₹ 13,500.

**(c)** A cupboard was bought for ₹ 2,500 and sold at ₹ 3,000.

**(d)** A skirt bought for ₹ 250 and sold at ₹ 150.

**Solution:
**

**Exercise 8.3 Class 7 Question 2.**

Convert each part of the ratio to percentage

**(a)** 3 : 1

**(b)** 2 : 3 : 5

**(c)** 1 : 4

**(d)** 1 : 2 : 5

**Solution:
**

**Exercise 8.3 Class 7 Question 3.**

The population of a city decreased from 25,000 to 24,500. Find the percentage decrease.

**Solution:
**

**Exercise 8.3 Class 7 Question 4.**

Arun bought a car for ₹ 3,50,000. The next year, the price went up to ₹ 3,70,000. What was the percentage of the price increase?

**Solution:
**

**Exercise 8.3 Class 7 Question 5.**

1 buy a T.V. for ₹ 10,000 and sell it at a profit of 20%. How much money do I get for it?

**Solution:**

C.P. = ₹ 10,000

Profit = 20% of C.P.

= 20% of ₹ 10,000

= ₹ \(\frac { 20 }{ 100 }\) × 10,000 = ₹ 2,000

∴ S.P. = C.P. + Profit

= ₹ 10,000 + ₹ 2,000 = ₹ 12,000

Hence, I get ₹ 12,000 for it.

**Exercise 8.3 Class 7 Question 6.**

Juki sells a washing machine for ₹ 13,500. She loses 20% in the bargain. What was the price at which she brought it?

**Solution:
**

**Exercise 8.3 Class 7 Question 7.**

**(i)** Chalk contains calcium, carbon, and oxygen in the ratio of 10 : 3 : 12. Find the percentage of carbon in chalk.

**(ii)** If in a stick of chalk, carbon is 3 g, what is the weight of the chalk stick?

**Solution:
**

**Exercise 8.3 Class 7 Question 8.**

Amina buys a book for ₹ 275 and sells it at a loss of 15%. How much does she sell it for?

**Solution:
**C.P. = ₹ 275

Loss = 15% of C.P = \(\frac { 15 }{ 100 }\) × C.P

= \(\frac { 15 }{ 100 }\) × 275

= ₹ 41.25

S.P. = C.P. – Loss = 275 – 41.25 = ₹ 233.75

hence, she se11 it for ₹ 233.75.

**Exercise 8.3 Class 7 Question 9.**

Find the amount to be paid at the end of 3 years in each case:

**(a)** Principal = ₹ 1,200 at 12% p.a.

**(b)** Principal = ₹ 7,500 aat 5% p.a.

**Solution:
**

**Exercise 8.3 Class 7 Question 10.**

What rate gives ₹ 280 as interest on a sum of ₹ 56,000 in 2 years?

**Solution:
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**Exercise 8.3 Class 7 Question 11.**

If Meena gives an interest of ₹ 45 for one year at 9% rate p.a. What is the sum she has borrowed?

**Solution:
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We hope the NCERT Solutions for Class 7 Maths Chapter 8 Comparing Quantities Ex 8.3 helps you. If you have any queries regarding NCERT Solutions for Class 7 Maths Chapter 8 Comparing Quantities Ex 8.3, drop a comment below and we will get back to you at the earliest.