Question

. Gauri takes 5 hours to paint a wall and Garima takes 6 hours to paint the same wall. How long
will they take to paint the wall, if they work together? If Gambhir helps Gauri and Garima finish
painting the wall and they all together take 3 hours to paint the same wall, find the time taken by
gambhir alone to paint same wall

answer is 2 8/11 hrs , 7.5 days​

Answer 1

Answer:

Gautam takes 5 hours to paint the wall.

In 1 hour, Gautam will paint ( 1 / 5 ) of the wall.

Gambhir takes 6 hours to paint the wall.

In 1 hour, Gambhir will paint ( 1 / 6 ) of the wall.

Adding the part of wall Gautam and Gambhir paint in 1 hour,

( 1/5 + 1/6 )

( 6/30 + 5/30 )

( 11 / 30 )

Hence in 1 hour, Gautam and Gambhir will together paint ( 11 / 30 ) of the wall.

Therefore,

Gautam and Gambhir will together take ( 30 / 11 ) hours i.e. ( 2 8/11 ) hours to paint the wall.

Answer 2

Answer:

wrong Question, there will be in question 3 Hrs replaced by 2 Hrs and in answer 7.5 Days is replaced by 7.5 Hours