Answer: 3 hours and 25 minutes
Step-by-step explanation:
Given:
Two numbers and 2.
To find:
How many are in 2.
Solution:
Let x be number of in 2.
Divide both sides by .
Therefore, required multiplication equation is and the required division equation is .
Firstly try to find the number between 100 and 400 which are actually divisible by 13 so
104,117,130………. 390
If you see the above arrangement the difference between numbers are common so we can apply arithmetic progression.
By arithmetic progression, last term can be denoted by
l= a+(n-1)d
Where l=390
a=104
d=13
n=?
390=104+(n-1)13
13n=286+13
n= 299/13
n= 23
So total number of terms =23
By using arithmetic progression sum of all A.P terms = (n/2)(a+l)
Sum = (23/2)(104+390)
=(23/2)*(494)
= 5,681
So answers is 5,681.
Answer:
. the area decreased by 7 is 14