ABC26GN5199 · Clocks
Subject: General Aptitude · Chapter: Clocks · Exam: 2004 · Marks: · Difficulty:
A wall-clock takes 9 seconds in tringing at 90' clock. The time, it will take in tringing at 11O' clock, is
(a)10 seconds
(b)10.80 seconds
(c)11 seconds
(d)11.25 seconds
Answer
Explanation
There are 8 intervals in 9 trings and 10 intervals in 11 trings. Time duration of 8 intervals $=9 \mathrm{sec}$. $$\begin{aligned} \therefore \text { Required time } & =\text { Duration of } 10 \text { intervals } \\ & =\left(\frac{9}{8} \times 10\right) \mathrm{sec}=11.25 \mathrm{sec} . \end{aligned}$$
Explanation as extracted from the printed page; notation may be imperfect.
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