Question

here my question help me please you help me I give you vote and thanks​

Answer 1

Hey dear!!

Answer:

Let length and breadth be l and b

l = 2b

height h = 5 m

Area of four walls = 420m^2

Area of 4 walls = 2×l×h + 2×b×h

because there are 4 walls which 2 walls are dependent on height and length and other two are dependent on height and breadth

so ,

2×l×h + 2×b×h = 420

substitute value of l and h

2×2b×5 +2×b×5 = 420

20b + 10b = 420

30b = 420

b = 420/30

b = 14 m

Breadth is 14 m

length,l = 2b = 2×14 = 28m