Question

Devika works 45 hours in five days from Monday to
Friday. If she worked 4 hours on Tuesday, 9 hours
on Thursday and 5 hours on Friday, then for how
many hours did she work on Monday and Wednesday
together?​

Answer 1

Devika works for 27 hours on Monday and Wednesday.

Step-by-step explanation:

Given:-

Working days in a week = 5 days.

Working hours per week = 45 hours/week.

Devika works on:-

Tuesday for = 4 hours.

Thursday for = 9 hours.

Friday for = 5 hours.

Solution:- The working days are Monday, Tuesday, Wednesday, Thursday and  Friday.

Therefore, total working hours per week can be represented as,

Total Working Hours per week (T) = Working Hours on Monday (M) + Working Hours on Tuesday (Tu) + Working Hours on Wednesday (W) + Working Hours on Thursday (Th) + Working Hours on Friday(F)

Therefore,

$T=M+Tu+W+Th+F$

$45=M+4+W+9+5$    -------------------------(from given)

$45=M+W+18$

$M+W=45-18$

$M+W=27 hours$

Working Hours on Monday + Working Hours On Wednesday = 27 hours.

Therefore Devika works for 27 hours on Monday and Wednesday.