A closed iron tank 12 m long, 9 m wide and 4 m deep is to be made. Det

1.	A closed iron tank 12 m long, 9 m wide and 4 m deep is to be made. Determine the cost of iron sheet used at the rate of Rs. 5 per metre sheet, sheet being 2 m wide.
Answer» Given, Length of closed iron tank = 12m Breadth = 9m Height = 4m Total surface area of tank = 2(12 × 9 + 9 × 4 + 4 × 12) = 2(192) = 384 m² Width of iron sheet = 2m (given) So, length of iron sheet =\(\cfrac{384}2\)= 192 m Hence, cost of iron sheet at rate Rs.5 per meter = 5 × 192 = Rs.960

A closed iron tank 12 m long, 9 m wide and 4 m deep is to be made. Determine the cost of iron sheet used at the rate of Rs. 5 per metre sheet, sheet being 2 m wide.

Answer»

Given,

Length of closed iron tank = 12m

Breadth = 9m

Height = 4m

Total surface area of tank = 2(12 × 9 + 9 × 4 + 4 × 12) = 2(192) = 384 m²

Width of iron sheet = 2m (given)

So, length of iron sheet =\(\cfrac{384}2\)= 192 m

Hence, cost of iron sheet at rate Rs.5 per meter = 5 × 192 = Rs.960