Question

a tank 30m long,20m broad and 12m deep, is dug in a field which is 500m and 30m wide.by how much will the level in m of the field rise if the earth dug out is evenly spread on the remainig part of the field

Answer 1

Answer:-

Volume of earth taken out = volume of the tank

=30m × 20m × 12m

Area of the tank =l×b

=30m × 20m

=600m²

Area of the field =500m × 30m

=15000m²

Area of the reaming field =(15000−600)m²

=14400 m²

∴ level of the filed raised

= (7200÷14400) m = (1÷2) m = 50 cm

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Answer 2

Answer:

Volume of earth taken out = volume of the tank = 30m × 20m × 12m

Area of the tank =l×b =30m × 20m = 600m²

Area of the field =500m × 30m = 15000m²

Area of the reaming field =(15000−600)m² = 14400 m²

∴ level of the filed raised = (7200÷14400) m = (1÷2) m = 50 cm