Question

1) If 24 painters can paint a house in 16 days. How many painters are required to paint the house in 12 days?
2) 8 men can complete a work in 25 days working 5 hours per day. If 5 men can complete the same work in 20 days, how many hours does each man have to work per day?

Answer 1

Answer:

1Ans- painter working for 7 hours paints a house in 16 × 24 days. 1 painter working for 1 hour paints a house in 16 × 24 × 7 days. Therefore, 28 painters working for 8 hours a day will finish the same work in 12 days.

2Ans- 5 men working 8hrs. took =20 days

1 man working 1 hr. will take= 20*5*8 days

Then, 8 men working 10 hrs. will take= ( 20*5*8 )/8∗10=10days.

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Answer 2

Answer:

1)28

2)10 hours

Step-by-step explanation:

1)1 painter working for 7 hours paints a house in 16 × 24 days. 1 painter working for 1 hour paints a house in 16 × 24 × 7 days. Therefore, 28 painters working for 8 hours a day will finish the same work in 12 days

2) 8 men x 5 hours x 25 days = 5 men x hours x 20 days

8 x 5 x 25 = 5 x 20

hours = 8 x 5 x 25/5 x20

1000/100 = 10

10 hours