Question

^ Answer the question from the attachment ^

Answer 1

Hey there!

The saving on the first day = 5 Rupees.

The saving is increased by 5 rupees daily. So, Difference between the consecutive days remains constant.

So , The following conditions are similar to A. P.

Given, Total amount (S) = 190*5 = 950 Rupees .
First day savings (a) = 5
Common difference (d) = 5 .
Let the number of days till she can save = n.

Now,
We know that
S = n/2 [ 2a + (n-1)d ]

Now,
950 = n/2 [ 10 + 5n - 5 ]

1900 = n [ 5 + 5n ]

1900 = 5n [ 1 + n ]

380 = n ( n + 1 )

19 * 20 = n ( n+1 )

n = 19 .

So , The child can continue to put coins till 19 days.

Total amount she saved = 19/2[10+ (18)5] = 19/2 [ 100 ] = 950 Rupees .

1) Saving money for the future is a good habit . It prevents wastage of money. It also helps children to learn to maintain accounts and also will make them understand it's value.

2) Parents must encourage this practice of saving money.