Question

help me fast..........

Answer 1

10 people paint 10 rooms in 10 days.

1 people paint 10 room in (10 x 10)= 100 days

20 people paint 10 room in 100/20 days
= 5 days

20 people paint 1 room in 5/10 days
= 1/2 days

20 people paint 20 room in 20/2 = 10days.

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20 people in 10 days paint 20 room.

20 people in 1 days paint (20x 10) room
= 200 rooms

20 people in 20 days paint 200/20 room = 10 rooms

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10 rooms painted in 20 days by 20 people

1 rooms painted in 20 people in 20/10 people = 2 people

20 rooms painted in 20 days in 2 x 20 people = 40 people