Question

if 10 people build a wall in 30 days how long will 15 people take to build the same wall

Answer 1

Answer :-

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Given :-

10 people build a wall in 30 days.

To find :-

how long will 15 people take to build the same wall?

Salutation :-

If 10 people build a wall in 30 days.

Then 1 people build a wall in 30 × 10 days = 300 days

•°• And 15 people build a wall in 300 / 15 days = 20 days.

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Answer 2

The number of people and the number of days needed is inversely proportional.

⇒ The more people there are, the fewer days needed

⇒ The fewer people there are, the more days needed

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10 people = 30 days

1 person = 30 x 10 = 300 days

15 people = 300 ÷ 15 = 20 days

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Answer: 15 people will need 20 days to build the same wall

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