emilykaiser7593 emilykaiser7593

08-03-2019
Mathematics

contestada

A window washer spends 6 minutes washing 8 windows. How long will it take him to wash 28 windows?

Respuesta :

CEViktor04 CEViktor04

08-03-2019

All things being equal, that should be 21 minutes.

Looking at proportion,

If it takes 6 mins for 8 windows

It will take x mins for 28 windows

So,

6---------------->8

x---------------->28

Cross multiply,

x=(6×28)÷8

x=21 minutes

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