Sign in
Please select an account to continue using cracku.in
↓ →
A clock is such that it loses 4 minutes each day. The clock is set right on February 25, 2008 at 2 p.m. How many minutes should be added to get the right time when the clock shows 9 am on 3rd March, 2008?
As clock loses 4 minutes each day .
Feb 25th, 2008 at 2pm it was set right . 2008 is a leap year so it will have 29 days in Feb .
So no of days between 25th Feb and 3rd march = 7 days .
In 7 days clock loses 7x4 = 28 minutes .
So now clock shows 1:32 pm on 3rd March 2008 at 2 pm.
As clock loses 4 minutes each day , it implies clock loses 4/24 minutes per each hour i.e it loses 1/360 minute for every one minute . This can imply that for every one hour clock moves only {60-$$\dfrac{\ 4}{24}$$} = $$\dfrac{\ 359}{6}$$ minutes for every hour.
lets assume 'X' hours before 2 pm the clock shows 9 am , this implies :
1:32 pm - $$\dfrac{\ 359\left(X\right)}{6}$$ minutes = 9:00 am
$$\dfrac{\ 359\left(X\right)}{6}$$ minutes = 4 hrs 32 mins
$$\dfrac{\ 359\left(X\right)}{6}$$ minutes = 272 mins
Therefore, X = $$\dfrac{\ 6\left(272\right)}{359}$$ hours = $$\dfrac{\ 1632}{359}\ $$ hours.
So, the time at which clock shows 9 am is actually {2 pm - $$\dfrac{\ 1632}{359}\ $$ hours } .
Now, lets the value which we need to add to get the right time at 9 am be "Y" minutes , then it implies :
{2 pm - $$\dfrac{\ 1632}{359}\ $$ hours } = 9 am + Y minutes
300 = $$\dfrac{\ 1632}{359}\ $$ hours + Y minutes
Hence, Y = 300 - $$\dfrac{\ 1632\left(60\right)}{359}\ \min$$
Y = $$\dfrac{\ 9780}{359}$$ minutes.
Create a FREE account and get:
Crack IPMAT 2026 with Cracku
Educational materials for IPMAT and IIMB UG preparation
Ask our AI anything
AI can make mistakes. Please verify important information.
AI can make mistakes. Please verify important information.