Answer :
[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]
The Correct choice is ~ D
When using shorter and steeper inclined planes, it makes lifting fast, and hence takes less time but more lifters are needed .
[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]
The Correct choice is ~ D
When using shorter and steeper inclined planes, it makes lifting fast, and hence takes less time but more lifters are needed .