Question

Find the cost of digging a cuboidal pit 7 m long, 5 m broad and 4 m deep at the rate of Rs. 20 per cu.metre

tell in metre plz fast​

Answer 1

Answer:

l=8 m, b=6 m, h=3 m

Volume =l×b×h=(8×6×2)m

3

=144m

3

Cost of digging per m

3

volume =Rs.30

Cost of digging per 144m

3

volume =Rs.144×30

= Rs. 4320

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Total surface area = l ×b×h

= 7×5×4

= 120m³

per cubic metre = 20rs

= 20×120

=1140rs