Let the time at which Mr. Clockilal entered the museum be ‘m’ minutes past 12 noon. ∴ |
11
2
m−30×0| = 20 ⇒ m = 3
7
11
As he spent more than 3 hours and less than 4 hours in the museum, and the angle between the minute and hour hands at the time of leaving was 220°, he must have left the museum between 3:3
7
11
pm and 4 p.m Let the time at which he left the museum be 'n' minutes past 3 p.m ∴ |
11
2
n−30×3|=220 ⇒ n=56
4
11
or 41
9
11
Hence, the time spent by Mr. Clockilal in the museum was either 3 hours52