the area of a small rectangular plot is 84 m2. if the difference between its length and the breadth id 5 m. find its perimeter.
Answers
Answered by
40
Hello friend
Let the length be l and breadth be b
According to the problem
l-b=5
l=5+b
Area=l×b
84=(b)(5+b)
b²+5b-84=0
b²+12b-7b-84=0
b(b+12)-7(b+12)=0
(b+12)(b-7)=0
b can take the values -12 or 7
As breadth can't be negative, b=7
l=b+5=12
Hope it helps!
Let the length be l and breadth be b
According to the problem
l-b=5
l=5+b
Area=l×b
84=(b)(5+b)
b²+5b-84=0
b²+12b-7b-84=0
b(b+12)-7(b+12)=0
(b+12)(b-7)=0
b can take the values -12 or 7
As breadth can't be negative, b=7
l=b+5=12
Hope it helps!
sharma15:
area is 84m2 not perimeter
Check it out...I've edited it
Answered by
0
Answer:
Let the length be l and breadth be b
According to the problem
l-b=5
l=5+b
Area=l×b
84=(b)(5+b)
b²+5b-84=0
b²+12b-7b-84=0
b(b+12)-7(b+12)=0
(b+12)(b-7)=0
b can take the values -12 or 7
As breadth can't be negative, b=7
l=b+5=12
Step-by-step explanation:
Similar questions
English,
7 months ago
Math,
7 months ago
Chemistry,
1 year ago
India Languages,
1 year ago
Biology,
1 year ago