Two houses 300m apart, what colour is this toilet

[Tennentslager]

Okay so I think it was added in 70s but what colour is the Armitage Shanks classic.

[Tennentslager]

The other hoose does have rooms etc but can't work out what one has the toilet.

[SteamyTea]

Going back to my 1970s SMP mathematics lessons, and the topic title question.

3PM

[dnb]

1 hour ago, SteamyTea said:

my 1970s SMP mathematics lessons

The self same SMP maths existed in the 1980s too.  But I think you missed a step in the working and didn't deduct the length of the soil pipe that the ghastly pink toilet outlet fits in. Therefore the answer is 2:50 pm. 

 

[SteamyTea]

23 minutes ago, dnb said:

Therefore the answer is 2:50 pm

That is when the first man with a shovel stops tunneling.