the length of rectangle is three times of width. if perimeter is 84cm . find lengths
Answers
Answer:
Breadth = 10.5cm, Length = 31.5cm
Step-by-step explanation:
Taking breadth and length as l and b respectively,
l = 3b
perimeter = 2(l + b) = 84cm
Substituting l with 3b, 2(3b + b) = 84cm
8b = 84cm
b = 84/8 = 10.5cm
l = 3*10.5 = 31.5cm
Hence the breadth = 10.5cm and the length = 31.5cm.
Answer:
Step-by-step explanation:
let the length of rectangle = l
breadth of rectangle = b
given data :
- l = 3b
- perimeter of rectangle is 84cm.
now,
from perimeter of rectangle:
=> 2 ( l+b) = 84
=> 2 ( 3b+b) = 84
=> 2 (4b) = 84
=> 8b = 84
=> b = 84/8
=> b =10.5cm
then length ( l )
from l = 3b
=> l = 3 x 10.5
=> l = 31.5 cm
hence ,
the length of rectangle is 31.5 cm and the breadth of rectangle is 10.5 cm ..........
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