Question

An open water tank 12m long, 9m wide and
4 m deep is to be made. Find the cost of
iron sheet required at the rate of Rs. 25 per m,
if the sheet is 1.5m wide.​

Answer 1

Answer:

Step-by-step explanation

L=12m ; W=9m ; D=4m

w=1.5m ; r=25 ₹/m ; Length of sheet required=s

Total sheet required to make open tank

A=LSA of cuboid+Area of Bottom of tank

A = [2D(L+W)] + [L×W]

= [2×4(12+9)] + [12×9]

= (8×21) + 108

= 168 + 108

= 276m²

We know that Area=Length * width

Area of sheet = s * w

276 = s × 1.5

∴ s = 276 / 1.5 = 184m

Length of sheet required = 184m

Cost of sheet = Length of sheet × rate

= s × r = 184 × 25 = ₹4600

NOTE:

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