Question

25 জন লোক ও 10 জন বালক একটি কাজ 6 দিনে করে ।অন্যদিকে 21 জন লোক ও 30 জন বালক কাজটি করে 3 দিনে ।কতজন বালক ও 23 জন লোকের সাথে ওই কাজটি 4 দিনে করবে?

Answer 1

Answer:

Let the amount of work done by a Man and a Boy in a day be m and b, respectively.

Then, as per the question

6(25m + 10b) = 5(21m + 30b)

Or, 150m + 60b = 105m + 150b

Or, 45m = 90b

Or, m = 2b……… (i)

Now, the total amount of work

= 150 m + 60b

= 360b (substituing m from i)……(ii)

Now, let the number of boys needed be x.

So,

4(40m + xb) = 360b

Or, 80b + xb = 90b

Or, x = 10.

So, 10 boys will be needed.

Answer 2

Answer:

25 person and 10 child do a work in 6days

21 person and 30 child do the same work in 3 days

How many children are needed with 23 person to do the same work in 4 days

Step-by-step explanation:

Hope it helps you

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