Question

13 years ago Mohan's age was seven years more than half the age of his sister. Five years from now Mohan's sister will be 1.2 times as old as Mohan What is Mohan's present age?​

Answer 1

Step-by-step explanation:

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let present age of Mohan be x and his sis be y

case 1:

13 years before

age of Mohan is (x-13) years

age of his sis is (y-13) years

ATQ:

x-13 = 7(y-13

x-13=7y-91

x-7y=13-91

x-7y=-78. 1

Case 2:

5 years later

age of mohan is (x+5) years

age of Mohan sis is (y+5) years

ATQ:

y+7=1.2(x+5)

y+7=1.2x+6

y-1.2x=-1. 2

On solving 1 and 2

age of Mohan is 10 years