Question

A tank with length, breadth and height of 8, 6 and 4 units respectively is open at the top. Find the cost of painting inside the tank at the rate of ₹10 per sq.units.

• A. $₹1600$
• B. $₹1400$
• C. $₹1500$
• D. $₹1450$

Answer 1

The correct option is A $₹1600$

Area inside the tank = Lateral Surface Area + floor area

$=2h(l+b)+lb$

$=2\times 4(8+6)+8\times 6$

=160 sq.units

Cost of painting 1 sq. unit = ₹10
So, total cost of painting
$=₹10\times \text{Area inside the tank}$
$=10\times 160$
$=₹1600$