Raj has a pocket of toffees and candies. It contains 120 candies. He arranges
the candies such that in first row there are 3 candies, in second there are 5,
in third there are 7 and so on.
total number rows of candies will be:
Answers
Given : Raj has a pocket of toffees and candies. It contains 120 candies.
He arranges the candies such that in first row there are 3 candies, in second there are 5, in third there are 7 and so on.
To Find : total number rows of candies
Solution:
Candies in 1st row = 3
Candies in 2nd row = 5
Candies in 3rd row = 7
a = 3
d = 2
let say n rows
Sum = (n/2)(2a + ( n- 1)d) ≥ 120
=> (n/2)( 2(3) + (n - 1)2) ≥ 120
=> n (3 + n - 1) ≥ 120
=> n(n + 2) ≥ 120
10(12) = 120
=> n = 10
total number rows of candies will be = 10
Learn More:
a,a+d,a+2d. l and n terms of an AP find ( n-1)
brainly.in/question/7612734
FIRST term if an AP is 4 and the common difference is 3 its 12th term ...
brainly.in/question/7843059
a =3 d=101 Then For A.P Sn - Brainly.in
brainly.in/question/13170418
Step-by-step explanation:
Find : total number rows of candies
Solution:
Candies in 1st row = 3
Candies in 2nd row = 5
Candies in 3rd row = 7
a = 3
d = 2
let say n rows
Sum = (n/2)(2a + ( n- 1)d) ≥ 120
=> (n/2)( 2(3) + (n - 1)2) ≥ 120
=> n (3 + n - 1) ≥ 120
=> n(n + 2) ≥ 120
10(12) = 120
=> n = 10
total number rows of candies will be = 10