CAT 1994 — QA Question 18
Number TheoryEasy
Passage / Data
Answer the next 2 questions based on the following information:
If
md(x) = x ,
mn(x,y) = minimum of x and y and
Ma(a,b,c,...) = maximum of a,b,c…
It takes the pendulum of a clock 7 seconds to strike 4 o’clock. How much time will it take to strike 11 o’clock?
Answer & solution
- A
18 seconds
- B
20 seconds
- C
19.25 seconds
23.33 seconds
Solution
If a clock has to strike 4 or 4 times, there are 3 time intervals between the 4 strikes (Since the first strike happens at the zeroth second).
So in 7 seconds the pendulum elapses 3 time intervals.
To strike 11, there has to be 10 time intervals, which will take = 23.33 seconds.