Question

The sum of the digits of a two digit number is 12. If 18 is added to it, the digit are reversed. Find

the number.

The ages of Sona and Sonali are in the ratio 5 : 3. Five years hence, the ratio of their ages will be

10 : 7. Find their present age.​

Answer 1

Answer:

write an activity to draw the magnetic field around a straight wire, circular loop, solenoid

Answer 2

Step-by-step explanation:

let the number be

10x+y

then

x+y=10..(I)

Now if 18 added

10x+y+18=10y+x

9x-9y=-18

x-y=-2..(ii)

adding both equations we get

2x=8

x=4

substituting x in any equation we get. y=6

so, Number Obtained is 10×4+6 =46