25. It takes five minutes to pass a rumour from one
person to two other persons. The tree of rumour continues.
Find how many minutes does it take spread the rumour to 768
persons. ?
Answer Posted / bindu
In the first 5 mins three people come to know of the
rumour; including the first person (who is still able to
spread the rumour!), i..e every 5 mins, three times the
people come to know of the rumour. So it just takes 30 mins
for 729 people and 35 mins for 2187 people to know of the
rumour.
| Is This Answer Correct ? | 8 Yes | 2 No |
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