Question

A tank with dimensions 15 m long, 10 m wide and 6 m deep is open at the top. If the width of the sheet is 2 m, then the 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 of tank $=2h(l+b)+lb$

$=2\times 6\times (15+10)+15\times 10$

$=(12\times 25)+150$

$=450m^2$

Area of sheet = length $\times$ width

Length of sheet $=\frac{450}{2}=225m$

Cost of iron sheet $=225\times 5=Rs.1125$