Reasoning Slow Fast Clocks


1.A clock is set right at 10a.m.But it gains 10mins in 24hours.What will be the true time if the clock shows 3pm the next day ?

A) 2:52p.m

B) 2:48p.m

C) 2:50p.m

D) 2:30p.m


Answer:B) 2:48p.m

Explanation:Gain 10mins in 24hours, then wrong time is 24hours 10mins.Clock set at 10a.m.Time interval between 10a.m to next day 3p.m is 29hours.Now the correct hour, (24*29)/(145/6)hours=28 1/2hours which is 28hours 48mins.Extra time gain is, 29hours-28hours 48mins=0.12mins.Now true time is, 3:00p.m-0:12p.m=2:48p.m .


2. A clock is set right at 5a.m.But it losess 16mins in 24hours.What will be the truet time if the clock shows 10pm in 4th day ?

A) 12a.m

B) 6a.m

C) 11p.m

D) 10p.m


Answer: C)11p.m

Explanation:Explanation as above