Question

A tank $15$ m long, $10$ m wide and $6$ m deep open at the top. If the width of the sheet is $2$ m, then cost of iron sheet at the rate of Rs. $5$ per meter is

• A. Rs. $550$
• B. Rs. $1050$
• C. Rs. $1125$
• D. Rs. $1150$

Answer 1

The correct option is C Rs. $1125$

Total surface Area (excluding top) of the tank $=450sq.m.$
$450sq.m=L\times 2m$ (i.e. area of sheet required)

$\therefore L=225m$
$\therefore$ cost at rate $Rs.5/m$ is $225\times 5=Rs.1125$.