Question

10. The present age of a brother is 5 years more than that his sister. If the sum of
their 21 ,
(6) 13 years
(a) 8 years
(c) 14 years
(d) 7 years
II. TRUE / FALSF​

Answer 1

Answer:

8,13 years

Step-by-step explanation:

Let the sister age = x

Brother age = x+5

sum of their ages= 21

According to question

x+x+5=21

2x+5=21

2x=21-5

2x=16

x=16/2

x=8

Thus age of sister = 8

And age of his brother = x+5

8+5=13 year