Question

please answer the question urgently

Answer 1

Given,
$l*b = 25$..........(1)
$b*h=8$.............(2)
$l*h = 18$...........(3)

Now, from (1),
l= 25/b..................(a)
From (3)
l= 18/h...................(b)
From a and b,
25/b=18/h
25h=18b......................(c)

Now multiplying (3) by 25/b
25/b*b*h=8*25/b
25h=8*25/b
18b=8*25/b.............(From c)
$18 b^{2} = 8*25$
Or, b=10/3
Therefore, upon putting the value of b in eq 2 and 3, we get:
l= 15/2
h=12/5
We know,
Volume = lbh
             = $\frac{15}{2} * \frac{10}{3} * \frac{12}{5}$
             = $60cm^{2}$

Hope it helped.Do check my calculations. ;P
NISHTHA.