Question

A student saves Rs5 in first week Rs10 in second week Rs 15 in third week and so on from the money given by his parent for his expenditure if he continue like the way how much money he save in 15 week​

Answer 1

Answer:

75 rs

Step-by-step explanation:

5.....in 1st week

10... In 2nd week

As so on......

So... 5 , 10 , 15 , .........

n=15.....we have to know about the exp. In 15 th week

a=5 ... d=t1-t2.. =10 - 5= 5......so.... d= 5

Tn = a + (n - 1) d

T15= 5 +(15 - 1) 5

= 5 + 14 ×5

=5 +70

=75

So in 15 th week the expenditure is 75 rs.

Answer 2

Answer:

75 rupees in 15 weeks

Step-by-step explanation:

1 week in 5 rupees save him

15 week*5rupees =75 rupees