Question

area of 4 walls of room is 144cm sq and height is 4 cm then perimeter is ​

Answer 1

Answer:

Step-by-step explanation:

L=LENGTH, B=BREADTH, H=HEIGHT.

L=4B

H=4

AREA=2ENDS(B*H)+2SIDES(L*H).

AREA=2(B*H)+2(L*H)

144=2(B*4)+2(4B*4)

144=2*4B+2*16B

144=8B+32B

144=40B

 

B=144/40 =3.4

L=4*3.6=14.4

AREA OF THE FLOOR=L*B

AREA=3.4*14.4=45.56 cm

Answer 2

lateralas S A of cuboid =2×(L+b)×h

by putting the value of h

144=2×(L+B)×4

9=L+B

P. of rectangle =2×L+B

18cm2