Question

Stranded on a deserted island, Harry Puttar is left with only a 40 litres container of milk. To conserve his milk he decides that on the first day he will drink one litre of milk and then refill the container back up with water. On the 2nd day he will drink 2 litres and refill the container. On the 3rd day he will drink 3 litres and so on... By the time all the milk is gone, how much water has he drunk?​

Answer 1

Answer:

It is given that the man has 40 litres container of milk.

Also, he will drink 1 litre on the first day, and refill the container with water, and will drink 2 litres on the second day.

He will refill the container, will drink 3 litres on the third day and refill the container again, and so on till the 40th of day.

Thus, at the end of 40 days, he must have drunk (1 + 2 + 3 + 4 + ..... + 38 + 39 + 40) = 820 litres of liquid.

Out of those 820 litres, 40 litres is the milk which he had initially.

Hence, he must have drunk 780 litres of water.

Answer 2

Answer:

780 litres

Step-by-step explanation:

ATQ

Harry drank some amount and then filled it with water

so, suppose he drank 1 litre of milk then filled the same amount with water

then the second day out of the 2 litres he drank 1 litre was previous day's water and the rest one litre was milk (basically n-1 amount was water), following this we get

1st day-0 litres water

2nd day - 1 litre water so on and so forth till forty

add the amounts which you get. finally you get 780

thank you!!!

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