Question

A tank with length, breadth and height of 5, 6 and 3 units respectively is open at the top. The cost of anti-microbial coating inside the tank if it is done at Rs.10 per sq. units is___________.

• A. Rs. 1260
• B. Rs.960
• C. Rs.660
• D. Rs.1060

Answer 1

The correct option is B

Rs.960

Area inside the tank= Lateral Surface Area + floor

=2h(l+b)+lb

=2 $\times$ 3 (5 + 6) + 5 $\times$ 6

=96 m${}^2$​

So, total cost = Rs.96 $\times$ 10 = Rs.960