NCERT 2022 | सूक्ष्मजीव : मित्र एवं शत्रु - L2 |CLASS 8 विज्ञान | 8 AM Class by Subhadra Ma'am

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

Two cars A and B leave Delhi at 8:30 a.m. and 9 a.m. for Shimla, respectively. They travel at the speeds of 40km/h and 50 km/h respectively. How many kilometres away from Delhi will the two cars be together? दो कारें A तथा B दिल्ली से क्रमशः 8: 30 a.m एवं 9 a.m में शिमला जाने के लिए खुलती है | वे क्रमशः 40 किमी/घंटा तथा 50 किमी/घंटा की चाल से यात्रा करती हैं | दोनों कारें दिल्ली से कितने किलोमीटर की दूरी पर एक साथ होंगी ?

Four pipes can fill a reservoir in 15, 20, 30 and 60 hours respectively. The first pipe was opened at 8 am second at 9 am third at 10 am and fourth at 11 am. When will the reservoir be full? 1 pdotmdot b. 2 pdotmdot c. 2. 30 pdotmdot d. 3 pdotmdot

In class 12 there are 8 students. In class 11 there are 6 students .In class 10 there are 5 students . Total ways of selecting 10 students , such that there are at least 2 students from each class and at most 5 students from 11 students of Class 10 and 11 combined is 100k. Then find value of k

P and Q are 120 km apart. A starts from P towards Q at 6 am. B starts from Q towards P at 11 am on the same day. A is 50% faster than B. They cross each other at 8 pm. At what time will A reach his destination? a. mid night b. 11 p.m. c. 2 a.m. the next day d. 11 a.m. the next day

There are 5 students in class 10, 6 students in class 11 and 8 students in class 12. If the number of ways, in which 10 students can be selected from them so as to include at least 2 students from each class and at most 5 students from the total 11 students of class 10 and 11 is 100 k, then k is equal to _______.

Ratio of the fares of First ,Second and Third class catogory of a train , between two stations is 10:7:2 and the ratio of passenger travelling in these category is 4:9:17 respectively .If the fare is increased by 1/4 in First class , 1/8 in second class and decreased by 10% i Third Class and the ratio of number of passenger in the category remains same .If the total amount received of Rs. 60590 , then find the total amount received from thrid class category .

Train X leaves New York at 1 A.M. and travels east at a constant speed of x mph. If train Z leaves New York at 2 AM and travels east, at what constant rate of speed will train Z have to travel in order to catch train X at exactly 5: 30 A.M.? 5/6x b. 9/8x c. 6/5x d. 9/7x e. 3/2x