Volume of the water in the rectangular tank
= (20 × 18.5 × 3.2) cu m. = 1184 cu m.
= 1184 kilolitre.
Time required to remove the water from the tank by pump =\frac{1184}{160}=\frac{37}{5} \mathrm{hr}=7 \mathrm{hr} 24 m.
2nd part :
Let the height of water in the paddy field = h m.
Volume of water in the paddy field will be 59.2 m × 40 m × h m =2368 h cu m
∴ 2368 h = 1184
∴ h =\frac{1184}{2368}= 0.5 m
∴ Height of water level = 0.5 m
