1.

The dimensions of an oil tin are 26 cm× 26 cm× 45 cm. Find the area of the tin sheet required for making 20 such tins. If 1 square metre of the tin sheet costs Rs. 10, find the cost of tin sheet used for these 20 tins.

Answer»

Given,

Dimensions of oil tin are = 26 cm × 26 cm × 45 cm

Then,

Area of tin sheet required for making one oil tin = total surface area of oil tin

= 2(lb x bh x hl) = 2(26 x 26 + 26 x 45 + 45 x 26) = 2(676 + 1170 + 1170)

= 2 x 3016 = 6032 cm2

Area of tin sheet required for 20 oil tins = 20 x 6032 = 120640 cm2 = 12.064 m2

So,

Cost of 1 m2 tin sheet = Rs. 10

∴cost of 12.064 m2 tin sheet = 10 x 12.064 = Rs. 120.64



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