Question

The length of a rectangle is 6 m less than three times its breadth. The
dimensions of the rectangle, if its perimeter is 148 m, are
(a) 54 m, 20 m
(b) 14 m, 40 m
(c) 54 m, 24 m
(d) 54 m, 14 m​

Answer 1

Answer:

(a) 54 m, 20 m

Step-by-step explanation:

Given, L= 3B - 6

Perimeter = 2(L+ B) = 148m

⇒ L + B = 148/2 = 74

∴  3B - 6 + B = 74

⇒ 4B = 80

⇒ B = 20m

∵ L = 3B -6 ⇒ 3×20 - 6

L = 60 - 6

L = 54 m