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AnilSinghBora
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Find the cost of digging a cuboidal pit 8m long, 6m broad and 3m deep at the rate of Rs 30 per m3. Q.4

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How i solve the question of class 9th ncert math of Surface areas and Volumes chapter of exercise 13.5  of question no 4. I think it is very important question of class 9th give me the tricky way for solving this question

Find the cost of digging a cuboidal pit 8m long, 6m broad and 3m deep at the rate of Rs 30 per m3

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  1. The given pit has its length(l) as 8m, width (b)as 6m and depth (h)as 3 m.

    Volume of cuboidal pit = l×b×h = (8×6×3) = 144 (using formula)

    Required Volume is 144 m3

    Now,

    Cost of digging per m3 volume = Rs 30

    Cost of digging 144 m3 volume = Rs (144×30) = Rs 4320

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