Question

The height of a wall is 5 times its width and it's length is 8 times its height. If the volume of the wall is, 12.8m³,find its length
Ans : 16m
Can anyone solve this....

Answer 1

wall way be square or rectangular.but according to questions we have length,width and height..so means it is a rectangular wall.
according to questions____
volume of rectangle=LxBxH
12.8 =LxBxH.........(1)
H=5B.......(2)
L=8H
L=8(5B)
L=40B.......(3)
put eq.(2) &(3)in eq.(1)
12.8 = 40B x B x 5B
12.8 = 200B3 (its B cube)
12.8
------ =B3
200
after solving it .we get .......B=0.4m
put this value of B in eq. (3)
L= (40x 0.4)m
L=16m......ans.

Answer 2

Step-by-step explanation:

h=5x

b=X

L=8x × 5x =40x

VOLUME= l×b×h

12.8= 40x × X× 5x

12.8= 200x³

x³= 12.8÷200

x³= 0.32

x= 0.4

L=0.4×40=16 cm