NCERT 2022 | मानव नेत्र तथा रंगबिरंगा संसार - L11 | CLASS 10 विज्ञान Ruchi Ma'am| 10 AM

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

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

A train starts from Delhi at 6 : 00 AM and reaches Ambala Cantt at 10 AM. The other train starts from Ambala Cantt at 8 AM and reaches Delhi at 11:30 PM. If the distance between Delhi and Ambala Cantt. is 200 km, then at what time did the two trains meet each other ?