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anonymous

  • one year ago

A ball is released from a height of 180 meters. In the 1st second, the ball drops 5 meters, in the 2nd second 15 meters, in the 3rd second 25 meters, and so on. How much time will the ball take to hit the ground?

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  1. anonymous
    • one year ago
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    @ganeshie8

  2. anonymous
    • one year ago
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    4 seconds 5 seconds 6 seconds 7 seconds

  3. welshfella
    • one year ago
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    here is the series 5,15,25

  4. anonymous
    • one year ago
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    yes it is going up by 10 per second

  5. welshfella
    • one year ago
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    each term is obtained form the last by adding 10

  6. anonymous
    • one year ago
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    but it would take more then 7 seconds to hit the ground...

  7. welshfella
    • one year ago
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    so if you keep going up the series adding as you go along until you get to 180 you'll get your answer

  8. anonymous
    • one year ago
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    Ohh, its 6 I get it thanks

  9. welshfella
    • one year ago
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    75 in in 4 seconds 120 in 5 seconds 175 in 6 seconds so ?

  10. anonymous
    • one year ago
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    5+15+25+35+45+55=180

  11. welshfella
    • one year ago
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    yes you are right i miscalculated somewhere

  12. anonymous
    • one year ago
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    Its okay I did same thing last time lol

  13. welshfella
    • one year ago
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    yes - shows we are human anyway!

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