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What do the mechines need fro their work...

What do the mechines need fro their working ?

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Since machines are meant to convert energy inot work, all mechines need energy for their working.
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Knowledge Check

  • A can do a piece of work in 9 days and B can do the same work in 15 days. If they work together, in what ratio A and B will receive their wages?

    A
    `3:5`
    B
    `5:3`
    C
    `2:5`
    D
    `5:2`

  • Parmod is able to do a pice of work in 15 days and Qasim can do the same work in 20 days. If they work together for 4 days, what fraction of work is now left?

    A
    `(8/15)`
    B
    `(7/15)`
    C
    `(11/15)`
    D
    `(2/11)`

  • A and B undertook a work for Rs. 2200. A alone can do the work in 10 days and B alone can do the same work in 12 days. If they work together, what will be the difference in Rs.) in the amount they receive?

    A
    350
    B
    250
    C
    200
    D
    300