Question

Mary has a rectangular patio in her garden. She decides to make the patio larger by increasing both its length and width by 10%. What is the percentage increase in the area of the patio?​

Answer 1

21% increase in area

Step-by-step explanation:

length =l

breath =b

area=l×b

rhen if increases by 10 percent

l+l×10÷100=1.1l

b+b×10÷100=1.1b

area=1.1l×1.1b=1.21lb

Converting back to percent, gives us 21%

Double check my work!!