Question

the sum of three numbers is 98 if the ratio of first to second is 2:3 and that of second to the third is 5:8 then the second no is?​

Answer 1

Answer:30

Step-by-step explanation:

Let numbers be a,b,c

a:b= 2:3 and b:c = 5:8

Equating both ratios a:b:c= 10:15:24.

The of these give 49

To get 98 we multiply 49 by 2.

So multiply 15 by 2 to get second number.

Answer 2

Answer:

Step-by-step explanation:

Solution:

Let the three numbers be x, y and z.

Sum of the numbers is 98.

x + y + z = 98………………(i)

The ratio of the first to the second is 2/3.

x/y = 2/3.

x = 2/3 × y.

x = 2y/3.

The ratio of the second to the third is 5/8.

y/z = 5/8.

z/y = 8/5.

z = 8/5 × y.

z = 8y/5.

Put the value of x = 2y/3 and z = 8y/5 in (i).

2y/3 + y + 8y/5 = 98

49y/15 = 98.

49y = 98 × 15.

49y = 1470.

y = 1470/49.

y = 30 .

Therefore, the second number is 30.

Answer: (c)