Question

do only 12 number question in copy with proper explanation​

Answer 1

answer: 15,20,25

step by step solution is in the picture..it may helps you

Answer 2

Answer:

the answer is

first number = 15

second number = 20

third number = 25

Step-by-step explanation:

the sum of three consecutive multiples of 5 is 60.

Let the number be x then according to the question it should be three consecutive multiple of 5

first number = 5x

second number = 5x+5 = 5(x+1)

third number = 5x+10 = 5(x+2)

Now, according to the question sum of these three consecutive numbers will be 60

$5x + 5(x + 1) + 5(x + 2) = 60 \\ 5x + 5x + 5 + 5x + 10 = 60 \\ 15x + 15 = 60 \\ 15x = 60 - 15 \\ 15x = 45 \\ x = \frac{45}{15} \\ x = 3$

Now putting on the value x in first,second,third number we get,

first number = 5 × 3 = 15

second number = 5 (3+1) = 5 × 4 = 20

third number = 5 (3+2) = 5 × 5 = 25

Now,cross checking the answers

first number + second number + third number = 60

15 + 20 + 25 = 60

60 = 60