Question

if 3 men with 4 boys can earn Rs.210 in 7 days and 11 men with 13 boys can earn
Rs.810 on 8 days in what time will men with 9 days earn Rs. 1100​

Answer 1

Answer:

hey mate here is your answer

Let m and n be the money earned by a boy and a man in 1 day.

Then, we have

3m + 4n = 2100/7

⇒3m + 4n = 300 ----------[1]

And

11m + 13n = 8300/8

⇒11m + 13n = 1037.5 –------[2]

Solving [1] and [2], we get

We get m = 50 and n = 37.5

Now we need to find k where

⇒ k(7m + 9n) = 11000

⇒ k(7 × 50 + 9 × 37.5) = 11000

⇒ 687.5 × k = 11000

⇒ k = 11000/687.5

⇒ k = 16

thank you