Question

18.
If 15 men can paint the walls of a building in 16 days, in how many days will
20 men complete the work.​

Answer 1

Answer:

21.33 days

Step-by-step explanation:

15 men painted wall in days = 16 days

1 man completes works in days = 16/15

20 men completed the work in days

$= \frac{ 16}{15} \times 20$

$= \frac{320}{15}$

= 21.33 days

Answer 2

ANSWER:

Given:

• Time taken by 15 men paint the walls of a building = 16days

To Find:

• Time taken by 20 men to complete the work

Solution:

We are given that,

⇒ Time taken by 15 men paint the walls of a building = 16days

So,

⇒ Work done = Men × Days

⇒ Work done = 15 × 16

⇒ Work done = 240 --------(1)

Now, we need to find that,

⇒ Time taken by 20 men paint the walls of a building

Let the time taken be D days,

So,

⇒ Time taken by 20 men paint the walls of a building = D

So,

⇒ Work done = Men × Days

⇒ Work done = 20 × D

⇒ Work done = 20D -------(2)

But, the work done is same.

So, equating (1) & (2)

⇒ 20D = 240

⇒ D = 240/20

⇒ D = 12

Hence, time taken by 20 men paint the walls of a building is 12 days.