Jim and his dad are bricklayers. jim can lay bricks for a fireplace and chimney in 5 days. with his father's he can build it in 2 days. how long would it take his father to build it alone?

we are given

Jim can lay bricks for a fireplace and chimney in 5 days

Jim's 1 day work is

we are given

With his father's help he can build it in 2 days

so, both can do same work in 2 days

so, both's 1 day work is

Let's assume

his father to build it alone in x days

his father 1 day work is

so, both's 1 days work is

so, we can set it to 1/2

we get

now, we can solve for x

now, we can cross multiply

now, we can solve for x

so,

his father to build it alone is

............Answer

a

step-by-step explanation: