Adesigner increased the area of a tapestry by 20%. by what percent the width of tapestry was decreased in the process, if its length was increased by 50%?

By 20%  the width of tapestry was decreased in the process.

Step-by-step explanation:

Given :  A designer increased the area of a tapestry by 20% and length was increased by 50%?    

To find : By what percent the width of tapestry was decreased in the process?

Solution  : Let the length and width of the tapestry is l and w respectively.

So, The area of tapestry is    

According to question,            

A designer increased the area of a tapestry by 20%.

i.e, The new area is  

And length was increased by 50%

i.e, The new length is  

and let the new width is w'

Then the area is

So, to find the new width is

Area = New area

The percentage of width of tapestry decreased is

Therefore, By 20%  the width of tapestry was decreased in the process.

13.46

step-by-step explanation:

16.80 x .20 = 13.46