NCERT 2022 | गति - L26 | गति का ग्राफीय रूप |CLASS 9 - विज्ञान | 9 AM Class by Subhadra Ma'am

A train leaves P at 9 am with speed of 30 km/h. Another train leaves Q at 11 am with speed of 45 km/h. The trains are travelling towards each other on parallel tracks. Distance between P and Q is 300 km. When they meet, what is the ratio of the distances covered by them? एक ट्रेन सुबह 9 बजे 30 km/h की गति से P से निकलती है। एक अन्य ट्रेन सुबह 11 बजे 45 km/h की गति से Q से निकलती है। ट्रेनें समानांतर पटरियों पर एक-दूसरे की ओर जा रही हैं। P और Q के बीच की दूरी 300 km है। वे कब मिलेंगीं, एवं उनके द्वारा तय की गई दूरियों का अनुपात कितना होगा?

Consider the marks, out of 100, obtained by 51 students of a class in a test, given in Table 14.9. M a r k s"N u m b e r o f S t u d e n t s"0-10 5 10-20 10 20-30 4 30-40 6 40-50 7 50-60 3 60-70 2 70-80 2 80-90 3 90-100 9Tot a l 51 Draw a freque

Train A takes 9 hours more than train B to cover a distance of 612 km. If its speed is doubled then it takes 3 hours less than the time taken by train B. The speed of the train B is : 612 km की यात्रा करने के लिए ट्रेन B की तुलना में, ट्रेन A 9 घंटे अधिक समय लेती है | यदि ट्रेन की गति को दोगुना किया जाता है, तो वह ट्रेन B की तुलना में 3 घंटे का समय कम लेती है | ट्रेन B की गति km/h में) है:-

CH. 14 STATISTICS Q1 Class 0-8 8-16 16-24 24-32 32-40 Frequency 10 12 26 9 15 e mean of above data by: () Direct method () Assumed mean method (ii) Step deviati iop metod. Q2 The following distribution shows the daily pocket allowance of children of a locali ty. The mean pocket allowance is Rs 20. Find the missing frequency Daily Pocket 0-20 20-40 40-60 0-80 80-100 No. Of Children 7 10 9 13 Q3. The following table shows age distribution of persons in a particular region. Find the: (0) mean age (i)modal age (ili) median age Age? Below!0 Below20 Below30 Below 40, Below 50 Belo No, persons ? 250 190 100 40 15 4 Arithmetic mean of the following frequency distribution is 50. Find the missing frequencies C.I. ? 0-20 20-40 40-60 60-80 80-100 Tota

12 PM Special Class | Class 11 - STRUCTURE OF ATOM || BOHR MODEL By Yakshu Ma'am

The total number of students in section A and B of a class is 110. The number of students in section A is 10 more than that of section B. The average score of the students in B, in a test, is 20% more than that of students in A. If the average score of all the students in the class is 72, then what is the average score of the students in A? किसी कक्षा के खंड A और खंड B के छात्रों की कुल संख्या 110 है | खंड A में छात्रों की संख्या खंड 9 के छात्रों की संख्या से 10 अधिक है| किसी परीक्षा में B के छात्रों का औसत प्राप्तंक A के छात्रों के औसत प्राप्तंक से 20% अधिक है | यदि सभी छात्रों का औसत प्राप्तांक 72 है, तो A के छात्रों का औसत प्राप्तांक ज्ञात करें |

The marks obtained by 20 students of a class in a test (out of 50) are given below : 40, 44, 45, 46, 50, 42, 41, 8, 26, 28, 9, 32, 24, 6, 42, 36, 39. The range of the data is

A person has office hours from 9 am to 5 pm in the evening. Find the median time of his office hours. किसी आदमी, जिसके कार्यालय का समय प्रात: काल 9 बजे से सांयकाल 5 बजे के बीच है, के कार्यालय घंटों का माधियका समय कया है ?

the daily minimum temperatures in degrees Celsius recorded in a certain Arctic region are as follows: -12. 5 ,-10. 8 ,-18. 6 ,-8. 4 ,-10. 8 ,-4. 2 ,-4. 8 ,-6. 7 ,-13. 2 , -11. 8 ,-2. 3 , 1.2 , 2.6 ,0,-2. 4 ,0, 3.2 , 2.7 , 3.4 ,0,-2. 4 ,-2. 4 ,0, 3. 2 , 2.7 , 3.4 ,0,-2. 4 ,-5. 8 ,-8. 9 ,-14 ,6,-12. 3 ,-11. 5 ,-7. 8 ,-2. 9 Represent them as frequency distribution table taking -19. 9\ to-15 as the first class interval.

Railway fares of 1st, 2nd and 3rd class between two stations were in the ratio of 8 6 : 3. The fares of 1st and 2nd class were subsequently reduced by 1/6a n d1/(12) respectively. If during a year the ratio 12 between the passengers of 1st, 2nd and 3rd classes was 9 :12 : 26 and the total amount collected by the sale of tickets was Rs, 1088, then find the collection from the passengers of 1st class. R s .260 b. R s .280 c. R s .300 d. R s .320