# Aptitude - Clock - Discussion

Discussion Forum : Clock - General Questions (Q.No. 15)
15.
At what time between 9 and 10 o'clock will the hands of a watch be together?
45 min. past 9
50 min. past 9
 49 1 min. past 9 11
 48 2 min. past 9 11
Explanation:

To be together between 9 and 10 o'clock, the minute hand has to gain 45 min. spaces.

55 min. spaces gained in 60 min.

 45 min. spaces are gained in 60 x 45 min or 49 1 min. 55 11

 The hands are together at 49 1 min. past 9. 11

Discussion:
47 comments Page 1 of 5.

Sivanandhini chandrasekar said:   12 months ago
Formula :
Θ = |11M/2 - 30H|.
0⁰=|11M/2 - 30*9|.
= 11M/2 - 270.
0⁰+270⁰=11M/2.
270*2/11=M.
540/11=M.
M = 49 1/11.
(6)

Saranya said:   2 years ago
55 = 60 min.
45 = x.
X= 60*45\55.
X = 540/11.
X = 49 1/11 past 9.
(1)

Suman said:   3 years ago
Thanks for explaining @Akhilesh.
(1)

Nikhil B said:   4 years ago
@All.

θ = (11m/2) - 30h is a standard formula.
(4)

Nisha lakshmi said:   5 years ago
BTW 9 and 10 the hand of the clock will be together at 9:45(min and hr hand coincides).
Since 55 min gained by min hand in 60 min.
Thus 1 min gained by min hand in 60/55 min.
Now 45 min gained by min hand in 60/55 * 45 = 540/11 min.

Harshitha said:   6 years ago
How come past 9 minutes? please explain it.

Irfan Qureshi said:   6 years ago
Formula : (11/2)M - 30*H = 0.

We have to find min so put H and get M.

M=min.
H=Hour.
put the value and get the answer in Min.

Vinayak said:   6 years ago
How does 60/55*45 become 49 1/11?

Please if anybody can explain this?
(2)

Babita dogra said:   7 years ago
How you take 55 mint? How it will come?
Explain it.!

Rakha said:   7 years ago
What to do when you take minute spaces in degrees instead of minutes?