A boy takes 3 minutes to lift a 20 litre water bucket from a 20 m deep well,while his father does it in 2 minutes ,(a)compare: (i)the work ,and (ii)power developed by them. (b)How much work rach deos?Take density of water =`10^(3)` kg `m^(-3)` and g=9.8 N `kg^(-1)`

Explanation

To solve the problem step by step, we will first calculate the work done by both the boy and his father, and then we will calculate the power developed by each of them.

### Step 1: Calculate the mass of the water bucket
The density of water is given as \( \rho = 10^3 \, \text{kg/m}^3 \) (or 1000 kg/m³). The volume of the water bucket is given as 20 liters.

1 liter = \( 0.001 \, \text{m}^3 \)

So, 20 liters = \( 20 \times 0.001 = 0.02 \, \text{m}^3 \)
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