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?

Question

anonymous · Answer

@ganeshie8

anonymous · Answer

4 seconds
5 seconds
6 seconds
7 seconds

welshfella · Answer

here is the series
5,15,25

anonymous · Answer

yes it is going up by 10 per second

welshfella · Answer

each term is obtained form the last by adding 10

anonymous · Answer

but it would take more then 7 seconds to hit the ground...

welshfella · Answer

so if you keep going up the series adding as you go along  until you get  to 180  you'll get your answer

anonymous · Answer

Ohh, its 6 I get it thanks

welshfella · Answer

75 in in 4 seconds
120 in 5 seconds
175 in 6 seconds



so ?

anonymous · Answer

5+15+25+35+45+55=180

welshfella · Answer

yes you are right i miscalculated somewhere

anonymous · Answer

Its okay I did same thing last time lol

welshfella · Answer

yes  - shows we are human anyway!