The total surface area of the walls of a room 7m long, 5m wide and xm high is 96m2. Find the value of x
-
A.
(frac{2}{3}) -
B.
2 -
C.
4 -
D.
8
Correct Answer: Option B
Explanation
T.S.A of the wall (=2(7times 5 + 7 times x + 5 times x) = 96\
70 + 14x + 10x = 96 Rightarrow 24x = 96-70=26\
x = frac{26}{24}=frac{13}{12})