When the hands of the clock are in the same straight line but not together, they are 30 minute spaces apart.
At 7 o'clock, they are 25 min. spaces apart.
∴ Minute hand will have to gain only 5 min. spaces.
55 min. spaces are gained in 60 min.
| 5 min. spaces are gained in |
❨ |
60 |
x 5 |
❩min |
= 5 |
5 |
min. |
| 55 |
11 |
| ∴ Required time = 5 |
5 |
min. past 7. |
| 11 |
