# 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 हिंदी मीडियम free to download in PDF or view online. Download NCERT Solutions Apps based on updated NCERT Solutions for 2019-20.

 Class 12: Maths – गणित Chapter 7: Integrals Exercise 7.1

## NCERT Solutions for Class 12 Maths Chapter 7 Exercise 7.1

### 12 Maths Exercise 7.1 Solutions

#### NCERT Solutions for Class 12 Maths Exercise 7.1 in English

NCERT Solutions for Class 12 Maths Chapter 7 Exercise 7.1 Integrals in English Medium is given below. Visit to हिंदी मीडियम or Class 12 Maths Chapter 7 main page or Top of the page.     Move to Top of the page

##### NCERT Solutions for Class 12 Maths Exercise 7.1 in Hindi

NCERT Solutions for Class 12 Maths Chapter 7 Exercise 7.1 Integrals in Hindi Medium is given below. Visit to English Medium or Class 12 Maths Chapter 7 main page or Top of the page.     Move to Top of the page

###### Questions for Practice
1. 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.
2. Five bad oranges are accidently 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.
3. 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.
4. Find the intervals in which the function f(x) = sin x + cos x, 0 < x < 2π is strictly increasing or strictly decreasing.

###### Important Questions
• 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.
• 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.
• 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?
• A bag contains 3 White, 3Black and 2 Red balls. 3 balls are successively drawn without replacement. Find the probability that third ball is red.