the length of a rectangle is 3 times its width if the perimeter is 84 M find the length of the rectangle
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let length be l and breadth be b.
1 l = 3b
perimeter = 2(l+b)
84 =2(3b+b). (since 1 l= 3b)
84 =6b+2b
84. =8b
84/8. =b
1.5. =b
l. =3b
l. = 3*1.5
l. = 4.5m
1 l = 3b
perimeter = 2(l+b)
84 =2(3b+b). (since 1 l= 3b)
84 =6b+2b
84. =8b
84/8. =b
1.5. =b
l. =3b
l. = 3*1.5
l. = 4.5m
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