how many cubic metre of earth must be dug out to Sink a well which is 16 m Deep and which has a radius 3.5 M ? If the earth taken out is spread over a rectangular plot of dimension 25 m × 16 m what is the height of a platform so formed
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Answered by
86
Amount of earth = Volume of well
Volume of well= 22/7×r×r×h
= 22/7 × 3.5×3.5×16
= 22×0.5×3.5×16
= 616
Volume of well = Volume of rectangular plot
616 = l×b×h
616 = 25×16×h
616 = 400×h
616/400 = h
h = 1.54m
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Volume of well= 22/7×r×r×h
= 22/7 × 3.5×3.5×16
= 22×0.5×3.5×16
= 616
Volume of well = Volume of rectangular plot
616 = l×b×h
616 = 25×16×h
616 = 400×h
616/400 = h
h = 1.54m
Hope it helps.
If you satisfied mark it brainliest.
Your support is encouragement for us.
Answered by
6
Step-by-step explanation:
Volume of well = 22/7×3.5×3.5×16
=616 cm sq.
Volume of well = volume of rectangular plot
616= 25×16×h
616= 400h
therefore, h= 616/400
1.54 m
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