P-ब्लॉक के तत्व | Class 11 NCERT रसायन विज्ञान | 1 PM Class By Shilpa Ma'am | L9 | Hindi Medium

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

Class 11 के बाद क्या ? Class 12 Hindi Medium की पढ़ाई साल के शुरू से कैसे करें ?

A machine P can print one lakh books in 8 hours, machine Q can print the same number of books in 10 hours while machine R can print them in 12 hours. All the machines are started at 9 a.m. while machine P is closed at 11 a.m. and the remaining two machines complete the work. Approximately at what time will the work be finished? a. 11 : 30 a.m. b. 12 noon c. 12 : 30 p.m. d. 1 p.m.

A class starts at 10 a.m. and lasts till 1.27 p.m. Four periods are held during this interval. After every period, 5 minutes are given free to the students. The exact duration of each period is (a) 42 minutes (b) 48 minutes (c) 51 minutes (d) 53 minutes

Imagine that your watch was correct at noon, but then it began to lose 30 minutes each hour. It now shows 4 p.m.but it stopped 5 hours ago.What is the correct time now? (a) 9.30 p.m.quad (b) 11 p.m.( c) 1 a.m.quad (d) 1.30 a.m.