Question

There are 3 banks in three banks there are 3 watch man's in if a person wants to go to the bank he had to give 100 ruppes to watch man when he go to bank his money will become double and when his coming back again he wants to give 100 to that watch man same he will do in three banks and lastly he had 100 ruppes how much money he had the first​

Answer 1

Step-by-step explanation:

No. of banks = 3

Money given to watchman while entering and coming out of bank = Rs.100

Let the money he had first be x.

Therefore,

2[2{2(x-100)-200}-200]-100 = 100

=2{2(2x-400)-200}-100 = 100

=2(4x-1000)-100 = 100

=8x - 2100 = 100

=8x = 2200

=x = 2200/8 = Rs.275

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