NCERT Solutions for class 10 Maths Chapter 3 Exercise 3.7 optional exercise pair of linear equations in two variables in Hindi medium and English medium. All solutions are prepared by experts accordance with new **CBSE Syllabus** 2018-19 for UP Board / Uttarakhand Board / CBSE Board **NCERT Books**. Download here (**Exercise 3.7** & **प्रश्नावली 3.7**) in PDF form.

## NCERT Solutions for class 10 Maths Chapter 3 Exercise 3.7

### Class 10 Maths Chapter 3 Exercise 3.7 English Medium

NCERT Solutions for class 10 Maths Chapter 3 Exercise 3.7 in English for up board / CBSE board / Uttarakhand board to use online. Click here to download solutions of all chapter **Class 10 Maths**. CLICK HERE for * Hindi Medium* Solutions.

### Class 10 Maths Chapter 3 Exercise 3.7 Hindi Medium

NCERT Solutions for class 10 Maths Chapter 3 Exercise 3.7 in Hindi to view online. If you need the pdf file of chapter 3, click here to get **Class 10 Maths Chapter 3**. Go back to * English Medium* Solutions.

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*Solutions.*

**Hindi Medium**#### Important Questions with Answers for practice

- A man covers a distance of 15 km in 3 hours partly by walking and partly by running. If he walks at 3 km/h and runs at 9 km/h, find the distance he covers by running. [Answer: 9 km]
- A and B are two points 150 km apart on a highway. Two cars start with different speeds from A and B at same time. If they move in same direction, they meet in 15 hours. If they move in opposite direction, they meet in one hour. Find their speeds. [Answer: 80 km/h, 70 km/h]
- A man invested ₹3500, part of it in a yearly interest rate of 4% and the rest at 5%. He receives a total annual interest of ₹153. How much did he invest at each rate? [Answer: ₹2200 at 4% and ₹1300 at 5%]
- A boat Covers 32 km upstream and 36 km downstream, in 7 hours. Also it Covers 40 km upstream and 48 km downstream in 9 hours. Find the speed. Of boat in still water and that of the stream. [Answer: 10 km/h, 2 km/h]
- The sum of the numerator and denominator of a fraction is 4 more than twice the numerator. If the numerator and denominator are increased by 3, they are in the ratio 2:3. Determine the fraction. [Answer: 5/9]
- Raju used 2 plastic bags and 1 paper bag in a day which cost him ₹ 35. While Ramesh used 3 plastic bags and 4 paper bags per day, which cost him ₹ 65. Find the cost of each bag. [Answer: 15, 5]
- 8 Women and 12 men can complete a work in 10 days while 6 women and 8 men can complete the same work in 14 days. Find the time taken by one woman alone and that one man alone to finish the work. [Answer: 1 woman in 140 days, 1 man in 280 days]
- The ratio of incomes of two persons A and B is 3:4 and the ratio of their expenditures is 5:7. If their savings are ₹ 15,000 annually find their annual incomes. [Answer: ₹90000, ₹120000]