Question

length of a rectangle is twice its breadth.if depth of tank is 3m and area pf its four walss is 108m2,find length of tank

Answer 1

Answer:

Step-by-step explanation:let length be-x

let breath be -y

x=2y

area=xy

108=2y*y

108=2y²

54=y²

√54=y

now x=2y so

x=2√54

Answer 2

Answer:

breadth=6m

length=12m

Step-by-step explanation:

since       ;   l=2b      ,     h=3m

2(l+b)h=108m^2

from 1

2(2b+b)3=108

18b=108

b=6m

l=2b

l=12m