Question:medium
If a clock gets slow by 5 minutes every hour, and it was correct at 6 AM on Monday, what will be the time at 6 PM on Tuesday?
If a clock gets slow by 5 minutes every hour, and it was correct at 6 AM on Monday, what will be the time at 6 PM on Tuesday?
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First count the real hours from Monday morning to Tuesday evening. Either calculate the total minutes lost or multiply the real interval by the clock rate $55/60$.
Updated On: Aug 14, 2026
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Solution and Explanation
Concept:
Step 1: Convert the interval to hours.
Monday $6$ AM to Tuesday $6$ PM is $36$ real hours.
Step 2: Find the displayed interval.
$36\times\dfrac{55}{60}=33$ displayed hours.
Step 3: Add the displayed interval to the starting reading.
Adding $33$ hours to Monday $6$ AM gives Tuesday $3$ PM.
Final Answer: Tuesday, $3$ PM
- In each real $60$ minutes, the clock displays only $55$ minutes.
- The displayed elapsed time equals real time multiplied by $55/60$.
Step 1: Convert the interval to hours.
Monday $6$ AM to Tuesday $6$ PM is $36$ real hours.
Step 2: Find the displayed interval.
$36\times\dfrac{55}{60}=33$ displayed hours.
Step 3: Add the displayed interval to the starting reading.
Adding $33$ hours to Monday $6$ AM gives Tuesday $3$ PM.
Final Answer: Tuesday, $3$ PM
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