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

Length of cuboidal pit l = 8 m, breadth b = 6 m and height h = 3 m.
Volume of cuboidal pit = lbh = 8 × 6 × 3 = 144 m³
Cost of digging at the rate of Rs 30 per m³ = Rs 144 × 30 = Rs 4320
Hence, the cost of digging the cuboidal pit is Rs 4320.