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Discussions & Feed Members (28)
Manoj Sharma profile picture Manoj Sharma profile picture
Manoj Sharma
2 d - Isalin

Time and work ka ek doubt hai bhai log: 'Pipe A tank ko 12 ghante me bharta hai, Pipe B 15 ghante me bharta hai, aur Pipe C 20 ghante me khali karta hai. Agar teeno pipe ek sath khol diye jaye to khali tank kitni der me bharega?'

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Manish Dhillon

1792173114
Bhai LCM method lagao seedha: Total capacity = LCM of (12, 15, 2 = 60 units. Efficiency of A = +5 units/hr Efficiency of B = +4 units/hr Efficiency of C (emptying) = -3 units/hr Net efficiency = 5 + 4 - 3 = +6 units/hr. Total time = 60 / 6 = 10 ghante! Ekdum simple.
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Shreya Majumdar

1792173118
10 ghante correct answer hai bhai. Bas khali karne wale pipe ki efficiency minus lena mat bhoolna.
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Arjun Rathore

1792173129
Bhai LCM method se time and work ke 90% sawal bina x maane 30 second me ban jaate hain.
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Rahul Tripathi profile picture Rahul Tripathi profile picture
Rahul Tripathi
2 d - Isalin

Science ka standard physics question: 'Agar ek uniform wire of resistance R ko stretch karke uski length ko double (2L) kar diya jaye, to uska naya resistance kitna hoga?' Options me 2R aur 4R dono rehta hai, correct answer kya hai?

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Anurag Verma

1792172808
Bhai correct answer hai 4R! Logic samajh lo: Resistance formula hota hai R = ρ(L/A). Jab wire ko stretch karke length double (2L) karoge, to volume constant hone ki wajah se area of cross-section aadha (A/2) ho jayega! Naya resistance R' = ρ (2L) / (A/2) = 4 × [ρ(L/A)] = 4R. Kabhi bhi 2R mat tick karna bhai, negative marking ho jayegi!
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Shweta Sharma

1792172815
Bhai ye mistake pichle saal Group D me hazaro bacho ne ki thi! 'Stretch karke double kiya' to 4R hota hai, aur 'dusri 2L length ki wire jodi' to 2R hota hai. Words ka difference dhyan rakhna.
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Monika Yadav

1792172811
Formula copy me note kar liya bhai, super crisp explanation!
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Trisha Das profile picture Trisha Das profile picture
Trisha Das
2 d - Isalin

Time and work ka ek doubt hai bhai log: 'Pipe A tank ko 12 ghante me bharta hai, Pipe B 15 ghante me bharta hai, aur Pipe C 20 ghante me khali karta hai. Agar teeno pipe ek sath khol diye jaye to khali tank kitni der me bharega?'

avatar

Riya Sen

1792172578
Bhai LCM method lagao seedha: Total capacity = LCM of (12, 15, 2 = 60 units. Efficiency of A = +5 units/hr Efficiency of B = +4 units/hr Efficiency of C (emptying) = -3 units/hr Net efficiency = 5 + 4 - 3 = +6 units/hr. Total time = 60 / 6 = 10 ghante! Ekdum simple.
· 0
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Santanu Paul

1792172583
10 ghante correct answer hai bhai. Bas khali karne wale pipe ki efficiency minus lena mat bhoolna.
· 0
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Debasmita Chakraborty

1792172579
Bhai LCM method se time and work ke 90% sawal bina x maane 30 second me ban jaate hain.
· 0
Ritika Joshi profile picture Ritika Joshi profile picture
Ritika Joshi
2 d - Isalin

Science ka standard physics question: 'Agar ek uniform wire of resistance R ko stretch karke uski length ko double (2L) kar diya jaye, to uska naya resistance kitna hoga?' Options me 2R aur 4R dono rehta hai, correct answer kya hai?

avatar

Rathin Ghosh

1792172232
Bhai correct answer hai 4R! Logic samajh lo: Resistance formula hota hai R = ρ(L/A). Jab wire ko stretch karke length double (2L) karoge, to volume constant hone ki wajah se area of cross-section aadha (A/2) ho jayega! Naya resistance R' = ρ (2L) / (A/2) = 4 × [ρ(L/A)] = 4R. Kabhi bhi 2R mat tick karna bhai, negative marking ho jayegi!
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Ishita Sen

1792172230
Bhai ye mistake pichle saal Group D me hazaro bacho ne ki thi! 'Stretch karke double kiya' to 4R hota hai, aur 'dusri 2L length ki wire jodi' to 2R hota hai. Words ka difference dhyan rakhna.
· 0
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Subir Sen

1792172241
Formula copy me note kar liya bhai, super crisp explanation!
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Rohan Gupta profile picture Rohan Gupta profile picture
Rohan Gupta
2 d - Isalin

Time and work ka ek doubt hai bhai log: 'Pipe A tank ko 12 ghante me bharta hai, Pipe B 15 ghante me bharta hai, aur Pipe C 20 ghante me khali karta hai. Agar teeno pipe ek sath khol diye jaye to khali tank kitni der me bharega?'

avatar

Shreya Majumdar

1792172015
Bhai LCM method lagao seedha: Total capacity = LCM of (12, 15, 2 = 60 units. Efficiency of A = +5 units/hr Efficiency of B = +4 units/hr Efficiency of C (emptying) = -3 units/hr Net efficiency = 5 + 4 - 3 = +6 units/hr. Total time = 60 / 6 = 10 ghante! Ekdum simple.
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Manish Dhillon

1792172023
10 ghante correct answer hai bhai. Bas khali karne wale pipe ki efficiency minus lena mat bhoolna.
· 0
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Santanu Paul

1792172012
Bhai LCM method se time and work ke 90% sawal bina x maane 30 second me ban jaate hain.
· 0
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