Question

The area four walls of a hall is $320m^2$. The length & breadth of the hall is $12.5m$ & $7.5m$ respectively, Find the height of the hall.

• A. $32m$
• B. $9m$
• C. $3m$
• D. $5m$
• E. $Noneofthese$

Answer 1

Answer: (A)

$32m$

formula,

$\frac{(l+b)h}{2}=area$

$\frac{(12.5+7.5)h}{2}=320$

$(12.5+7.5)h=640$

$20h=640$

$\therefore h=32m$