Question

Suyash was challenged by a friend to do 100 pushups in a row. He started practising by doing just 15 pushups on Day 1. Every day, he could do 5 more pushups than the previous day.On which day will Suyash be able to do 100 pushups in a row?

Answer 1

Answer:

Here a1=15, Common difference=5 and an=100 n=?

Formula=an=a+(n-1)d

100=15+(n-1)5

100=15+5n-5

100=10+5n

100-10=5n

90/5=n

18=n

Therefore on 18th day Suyash be able to do 100 pushups in a row