# NCERT Solutions for Class 12 Maths Chapter 7 Exercise 7.1

NCERT Solutions for Class 12 Maths Chapter 7 Exercise 7.1 Integrals in English Medium as well as Hindi Medium free to download in PDF or view online without downloading updated for new academic session 2020-2021.

Download UP Board solution and NCERT Solutions Apps based on updated NCERT Solutions for 2020-21. No login or password is required to access the contents of this website. Everything given on the website are free to use.## NCERT Solutions for Class 12 Maths Chapter 7 Exercise 7.1

Class: 12 | Maths (English and Hindi Medium) |

Chapter 7: | Exercise 7.1 |

### 12th Maths Exercise 7.1 Solutions

NCERT Solutions for Class 12 Maths Chapter 7 Exercise 7.1 Integrals in English & Hindi Medium are given below to free download in PDF form updated on the basis of new NCERT Books 2020-2021. Visit to Hindi Medium or Class 12 Maths Chapter 7 main page to get all the exercises NCERT Solutions.

### Class 12 Maths Exercise 7.1 Solutions in Hindi & English

#### Class 12 Maths Exercise 7.1 Solution in Hindi and English Medium

Class 12 Maths Chapter 7 Exercise 7.1 Solution

Class 12 Maths Exercise 7.1 Solution in Hindi

#### Questions from Board Papers

- If a young man rides his motorcycle at a speed of 25 Km/hr, he has to spend ₹2 per Km on petrol. If he rides at a faster speed of 40 Km/hr the petrol cost increases to ₹5 per Km. He has ₹100 to spend on petrol and wished to cover the maximum distance within one hour. Express this as L.P.P. and then solve it graphically.
- Five bad oranges are accidentally mixed with 20 good ones. If four oranges are draw one by one successively with replacement, then find the probability distribution of getting bad oranges.
- Two cards from a pack of 52 cords are lost from the remaining 50 cards, one card is drawn. If the drawn card is a spade, what the probability that lost cards were both spades.
- Find the intervals in which the function f(x) = sin x + cos x, 0 < x < 2π is strictly increasing or strictly decreasing.

##### Important Questions for Practice

- 1. A trust invested some money in two type of bonds. The first bond pays 10% interest and second bond pays 12% interest. The trust received ₹2800 as interest. However, if trust had inter changed money in bonds, they would have got ₹100 less as interest using matrix method, find the amount invested in each bond by the trust.
- 2. Two balls are drawn at random from a bag containing 6 red and 4 green balls, find the probability that both balls are of same colour.
- 3. The radius of a circle increases at a rate of 3 cm/sec. What is the rate of increase of its area at the instant when radius of circle is 10 cm?
- 4. A bag contains 3 White, 3 Black and 2 Red balls. 3 balls are successively drawn without replacement. Find the probability that third ball is red.

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