Question

4 men and 6 boys can finish a piece of work in 5 days while 3 men and 4 boys can finish it in 7 days find the time taken by one man alone or one boy alone​

Answer 1

Answer:

One man can finish his work in 35 days and one boy can finish his work in 70 days

Step-by-step explanation:

No of days taken by 1 man =x days

No of days taken by 1 boy = y days

Work done by 1 men in 1 day = 1/x

Work done by 1 boy in 1 day =1/y

1st condition :

4/x +6/y =1/5

2nd condition ;

3/x+4/y =1/7

let 1 /x =a and 1/y =b

Multiply eq 1 by 3 and eq 2 by 4

12a +18b = 3/5

12a + 16b =4/7

Subtract

12a -12a + 18b -16b =3/5-4/7

2b=1/35

b =1/70

b = 70

put value

4/x +6/70 =1/5

1/x =1/4×(1/5-6/70)

a=35

Answer 2

Answer:

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