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CGP EDU Academic Team
Published on: August 13, 2026
There are 201 equidistant rows of spectators sitting in a hall. A magician releases laughing gas, N2O (molwt = 44) from the front and the tear gas (molwt = 176) from the rear of the hall simultaneously. Which row of spectators will have a tendency to smile and weep simultaneously at first ?
Text Solution
Verified by ExpertsThe correct answer is:
A
Let at n th row from the front both N 2 O and tear gas meet simultaneously
∴ 
= 
= 
= 2
∴ n = 2 × 201 – 2n
or 3n = 2 × 201
or n = 
= 134
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