Question

2. Mangala started doing physical exercise
for 10 minutes on the first day. She increases the time of exercise by 5 minutes
per day, till she reaches 45 minutes per
day. How many days are required to reach
45 minutes of exercise per day?
Ans. ​

Answer 1

please mark BRAINLIEST

Man.gal a doi ng exer.cise fi.rst day =10 mi.nutes

.

⇒10,15 ,20.4.5

Since l=a+(n−)d

⇒45=1.0+(.n−1)×5

⇒n−1=7

⇒n=8