A) 1 m
B) 2 m
C) 3 m
D) 4 m
Correct Answer: A
Solution :
(a): Volume of mud dug out \[=10\times 4.5\times 3\]\[=135\,{{m}^{3}}\] Let the remaining ground rise by = ?h? m Then \[\{(20\times 9)-(10\times 4.5)\}h=135\] \[135\,h=135\Rightarrow h=1\text{ }m\]You need to login to perform this action.
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