रासायनिक आबन्ध तथा आण्विक संरचना - L15 | Class11 रसायन विज्ञान | Nishtha Ma'am | 10 AM | Doubtnut

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

In a press, there are three types of printing machines, P, Q and R. Machine P can print 10,000 pages in 8 hours, machine Q can finish the same task in 10 hours and machine R can finish the same task in 15 hours. All the three machines start the work at 9 : 00 a. m. Machine P breaks down at 11 : 00 a.m. and machines Q and R finish the task. The approximate time of completion of the job is :

A man starts running from point P at 11:00 a.m. with a speed of 10 km/hr. He runs for 2 hourse and then takes a 1 hour rest. He continues this till he is caught by another man who starts at 2:00 pm from point P and runs non- stop at a speed of 15 km/hr towards the first man. At what time (in pm) will the first man be caught?

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

Class 10 Chemistry all Important रासायनिक समीकरण तथा Topic सिर्फ 15 मिनट में

Three bells rings at the interval of 10, 15 and 20 min, respectively. If they all ring at 11 am at once, then What time they will ring together again?

A man cycles with a speed of 10 kmph and reaches his office at 1 p.m. However, when he cycles with a speed of 15 kmph, he reaches his office at 11 a.m. At what speed should he cycle so that he reaches his office at 12 noon ?

The amplitude of upper and lower side bands of A.M. wave where a carrier signal with frequency 11.21 MHz, peak voltage 15 V is amplitude modulated by a 7.7 kHz sine wave of 5V amplitude are (a)/(10) V and (b)/(10)V respectively. Then the value of (a)/(b) is ____________.

Find the AM of the following data by short-cut method. {:("Class Interval",f),(" "1-5,5),(" "6-10,10),(" "11-15,15),(" "16-20,10),(" "21-25,5):}