Question

Please Help me 5 People can build a wall in one hour how long will it take 8 people Give the answer in Minutes

Answer 1

Answer:

if 5 people =1 hour. which is 60 minutes.

so 8people.52 minutes ...it wont take hours .since an hour is 60 min.

Answer 2

Answer:

$\boxed{37.5 \: \: \: minutes}$

Step-by-step explanation:

Let's solve:

$\mathsf {people \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: time( \: in \: minutes) }$

$\mathsf{5 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 1 hour = 60 minutes}$

$\mathsf{8 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: x}$

Here, Let 8 people take x minutes to complete the work.

Since, the number of people and their working minutes are indirect proportional. So,

Here, the ratio of people = 5 : 8

The ratio of minutes = 60 : x

So,

$\mathsf{ \frac{5}{8} = \frac{x}{60} }$

Apply cross product property

⇒$\mathsf{8x = 60 \times 5}$

Multiply the numbers

⇒$\mathsf{8x = 300}$

Divide both sides of the equation by 8

⇒$\mathsf {\frac{8x}{8} = \frac{300}{8} }$

Calculate

⇒$\mathsf{x = 37.5 \: minutes}$

Hope I helped!

Best regards!