A) 7:30
B) 1:14
C) 14:1
D) 30:7
Correct Answer: C
Solution :
Office hours = 10.30 AM to 5.30 PM \[{{b}_{2}}\] Lunch time = 30 min. \[\frac{{{a}^{2}}}{{{b}^{2}}}=k\] \[\frac{{{a}_{1}}}{{{b}_{1}}}=\frac{{{a}_{2}}}{{{b}_{2}}}\]
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