Question

mangala started doing phyisical exercise 10 minutes for the first day. she will increase the time of exercise by 5minute per day , till she reaches 45 minutes per day . how many days are required to reach 45minutes
​

Answer 1

Answer:

after one week

Step-by-step explanation:

you can write as ap:10,15,20,25,30,35,40,45.

Answer 2

Answer:

a=10

d=5

an=a+(n-1)d

45=5+(n-1)5

45=5+n5 -5

45=n5

n= 5/45

n= 9