Question

a is twice as old as b who is 3years older than c. If a's age is 5times c's age, how old is B?​

Answer 1

Answer:

5 years old

Step-by-step explanation:

by given:

a = 2b ...(1)

b = c + 3 ...(2)

a = 5c ...(3)

b = ?

Sub. (1) in (2)

i.e, sub. b = a/2 in (2)

a/2 = a/5 + 3

a/2 - a/5 = 3

(5a - 2a)/10 = 3

3a = 30

a = 10

sub. a = 10 in (1)

b = 10/2

b = 5