## BdMO National 2013: Primary 1

BdMO
Posts: 134
Joined: Tue Jan 18, 2011 1:31 pm

### BdMO National 2013: Primary 1

A group of $7$ women takes $7$ days to make $7$ Nokshikatha. How many days will a group of $5$ women take for making $5$ Nokshikatha?

Asif_Himel
Posts: 1
Joined: Sat Jan 18, 2014 5:39 pm

### Re: BdMO National 2013: Primary 1

3.857142857
ba 27/7

Labib
Posts: 411
Joined: Thu Dec 09, 2010 10:58 pm
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### Re: BdMO National 2013: Primary 1

Think harder.
Please Install $L^AT_EX$ fonts in your PC for better looking equations,
Learn how to write equations, and don't forget to read

"When you have eliminated the impossible, whatever remains, however improbable, must be the truth." - Sherlock Holmes

Ahanaf Akif Pathan
Posts: 1
Joined: Tue Jan 21, 2014 5:01 pm

### Re: BdMO National 2013: Primary 1

Only 7 days

Labib
Posts: 411
Joined: Thu Dec 09, 2010 10:58 pm
Contact:

### Re: BdMO National 2013: Primary 1

Ahanaf Akif Pathan wrote:Only 7 days
@Ahnaf Akif Pathan
Please post your full solution. People actually post problems, because they do not know how to approach or solve the full problem(and sometimes to share good problems).
If they just needed an answer, they would just use a computer. So kindly practice posting full solutions.

Here's a full solution-
If $7$ people need $7$ days to make $7$ katha, then it will take $7.7=49$ days for $1$ person to make $7$ katha (since the workload will $7$ times more)
So it will take that person $\frac{49}7 = 7$ days to sew each katha. ($7$ times less workload)
Therefore it takes $5*7=35$ days for the person to sew $5$ katha. ($5$ times more workload)
Now if we increase the number of sewers to $5$, the workload will be reduced $5$ times.
So, the time needed for $5$ people to sew $5$ katha will be $\frac{35}5 = \boxed 7$ days.
Please Install $L^AT_EX$ fonts in your PC for better looking equations,
Learn how to write equations, and don't forget to read

"When you have eliminated the impossible, whatever remains, however improbable, must be the truth." - Sherlock Holmes

atiab jobayer
Posts: 23
Joined: Thu Dec 19, 2013 7:40 pm

### Re: BdMO National 2013: Primary 1

It is only 7days
math champion

MD.MUNTAKIMUL MAHBUB
Posts: 1
Joined: Fri Feb 07, 2014 2:37 pm

### Re: BdMO National 2013: Primary 1

BdMO wrote:A group of $7$ women takes $7$ days to make $7$ Nokshikatha. How many days will a group of $5$ women take for making $5$ Nokshikatha?
If 7 people need 7 days to make 7 katha, then it will take 77=49 days for 1 person to make 7 katha (since the workload will 7 times more)
So it will take that person 749=7 days to sew each katha. (7 times less workload)
Therefore it takes 57=35 days for the person to sew 5 katha. (5 times more workload)
Now if we increase the number of sewers to 5 , the workload will be reduced 5 times.
So, the time needed for 5 people to sew 5 katha will be 535=7 days.

prantick
Posts: 12
Joined: Thu Jan 08, 2015 9:00 pm

need 7 days