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Answer:
1.4m
Step-by-step explanation:
Given r = 4.2 m, h = 38 m
Volume of well
= pi*r*r*h
= 22/7*4.2*4.2*38
= 22*.6*4.2*38
= 21067. 2 m^3
Let rise in level of field = d
Then,
Volume of Reactangular field
= Volume of well
l*b*d = 21067.2
130*115*d = 21067.2
d = 21067.2/(130*115)
d = 162/115
d = 1.4 m
Rise in level of field = 1.4 m