Find the cost of digging a cuboidal a pit 8m long, 6m broad and 3m deep at the rate of RS 30 per m cube?
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total surface area of couboidal pit is =2 (lb+bh+lh)
=2 (6×8+8×3+3×6)
=2 (48+24+18)
=2 (120)
=240 m cube
1 m cube=30 rupees
240 m cube =?
on cross multiplication
240×30whole divided by 1
we get 7200 /1=7200rupees
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