कार्य,ऊर्जा और शक्ति-L10 | NUMERICALS |Class 11 भौतिक विज्ञान | Ruchi Ma'am | 9AM | Doubtnut

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

Two cars X and Y start from places A and B respectively which are 700 km apart at 9 a.m. Both the cars run at an average speed of 60 km/hr. Car X at stops 10 a.m. and again starts at 11 a.m. while the other car continues to run without stopping. The two cars cross each other at 2: 40 pdotmdot b. 3: 20 pdotmdot c. 4: 10 pdotmdot d. 4: 20 pdotmdot

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