Question

It takes you 8 hours to dig a hole. It would take you and your brother 5 hours to dig that same hile together. If your brother was to dig the hole by himself it would take him how many hours?

Answer 1

Answer:

I think if it takes me 8 hours then it will surely take him 8 hours

Answer 2

Answer:

40/3 hrs = 13.3 hrs

Step-by-step explanation:

Let me = K , my brother = P

K digs a hole in 8 hrs

K in 1 hr digs 1/8 of a hole

K + P dig a hole in 5 hrs

K + P in 1 hr dig 1/5

Let the portion of the hole Plan digs in 1 hr be x

1/8 + x = 1/5

x = 3/40

3/40 of the hole is dug by P in 1 hr

1 of the hole is dug by P in 40/3 hrs

= 40/3 hrs

=13.3 hrs