1.

If the length of line to be laid each year is in proportion to the estimated cost for material and labour, what fraction of the total length is proposed to be completed by the third year?1). 0.92). 0.73). 0.64). 0.3

Answer»

Cost of materials = cost of (cement + steel + BRICKS + other building materials)

Cost of materials + Cost of labour for 1st year = 0 + 2.1 = 2.1 lakhs

Cost of materials + Cost of labour for 2nd year = 95 + 70 + 15 + 25 + 25 = 230 lakhs

Cost of materials + Cost of labour for 3rd year = 80 + 45 + 12 + 18 + 20 = 175 lakhs

Cost of materials + Cost of labour for 4th year = 75 + 60 + 16 + 21 + 18 = 190 lakhs

Given, length of line to be laid each year is in PROPORTION to the estimated cost for material and labour.

∴ Portion of the total length completed by 3rd year $(= \frac{{2.1 + 230 + 175}}{{2.1 + 230 + 175 + 190}})$

= 0.68 ≈ 0.7


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