Question

The length and height of the room are in the ratio of 3:8 and the height and breadth in the ratio 7:5. If the area of the four walls of the room is 720m², then the area of the floor is?

PLEASE ANSWER ASAP!!
IRRELEVANT ANSWERS WILL BE REPORTED!!​

Answer 1

Answer:

86m²

I tried but don't know it is correct or not

Step-by-step explanation:

l:h= 3:8

h:b=7:5

l:h: :h:b= 3×7: 8×7 : :7×8: 5×8

ie l:h:b= 21:56:40

four walls area is 720 ( surface area)

2h(l+b)=720

2×56x(21x+40x)= 720

112x(61x)= 720

x²= 720/(112×61)

we get x= 0.32

area of floor is l×b

21x × 40x

6.72 × 12.8

86