7.
A cuboidal oil tin is 30 cm by 40 cm by 50 cm. Find the cost of the tin required for
making 20 such tins if the cost of tin sheet is Rs 12 per square metre. Also, find the
quantity of oil that these 20 tins can hold.
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Answer:
Step-by-step explanation:
The dimensions of cuboidal tin are 30 cm * 40 cm * 50 cm
= 0.3 m * 0.4 m * 0.5 m
Let Length = 0.3 m
Breadth = 0.4 m
Height = 0.5 m
TSA of Cuboid = 2(lb+bh+lh)
= 2 ( 0.12 + 0.20 + 0.15) = 2 * 0.47 = 0.94 m².
TSA pf 20 oil tins = 20 * 0.94 = 1.88 m².
Cost of Tin sheet required = 1.88 * 20 = Rs. 37.60.
Volume of 1 oil tin = L * B * H = 0.06 m³.
Volume of 20 oil tins = 20 * 0.06 = 1.2 m³.
Thus 20 oil tins can hold 1.2 litres of oil.
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