An open water tank 12 m long 9 m wide and 4 mdeep is be made. Determine the cost
of iron sheet required at the rate of 25 per m, if sheet is 1.5 m wide.
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ANSWER:
Cost of iron sheet required to make open tank is ₹4600.
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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