Question

The dimensions of bar, 2 m long, are sions of the L-shaped cross-section of long, are shown in cm in Fig. 18.17. Find (i) the volume of the bar. (ii) the weight, if the materi per cm. weight, if the material weighs 0.3 kg ​

Answer 1

The volume of the bar is 825 cm^3 .

Step-by-step explanation:

Length of the bar = 2 m = 2 x 100 = 200 cm

Area of first part (ABCD) = 7 / 2 x 3 / 4

Area of first part (ABCD) =  21/8 cm^2

Area of second part (GEFF) = 3 x 1/2 = 3/2 cm^2

Area of total part = 21/8 + 3/2 = 21 +12 / 8 = 33/8 cm^2

Volume = Area x length

Volume = 33/8 x 200 = 825 cm^3

Thus the volume of the bar is 825 cm^3 .

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Answer 2

Answer:

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