A field is 80m long and 50m broad. A pit which is 15m long, 5m broad and 8m deep has been dug out from a nearby plot. The earth taken out of it is evenly spread over the field. Find the approximate rise in the level of the field.
Answers
Answer:
15.28cm
Step-by-step explanation:
Length of field = 80 m
Breadth of field = 50 m
Length of pit = 10 m
Breadth of pit = 7.5 m
Height of pit = 8 m
Volume of earth taken out = volume of pit
= L*B*H
= 10*7.5*8
= 600 cu m
Area of rectangular field = 80*50
= 4000 sq m
Area of the base of pit = 10*7.5
= 75 sq m
Area of remaining portion of rectangular field = Area of rectangular field - Area of the base of pit
= 4000 - 75
= 3925 sq m
Now rise in the level of remaining part of the field = 600/3925
= 0.1528 m or 15.28 cm
So, rise in the remaining part of the field = 15.28 cm
Answer:
15cm
Step-by-step explanation:
Area of field = 80m * 50m
Volume of pit = 15m * 5m*8m
Increase in height = Area of field * h = Volume of pit
h = 15*5*8
--------------- = 3
80*50 ------- m
20
1 m = 100 cm
3 * 100
--- = 15 cm
20
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