3 men and 4 boys can earn rs756 in
7 days. 11 men and 13 boys can earn
rs3008 in 8 days. In what time will
7 men with 9 boys earn rs 2480?
Answers
Answered by
4
Answer:
10 days
Step-by-step explanation:
let number of men be x
number of boys be y
3 men and 4 boys earn 756 in 7 days
3 men and 4 boys earn in 1 day
= 756/7
= 108
3x + 4y = 108 equ (1)
11 men and 13 boys earn 3008 in 8 days
11 men and 13 boys earn in 1 day
= 3008/8
= 376
11x + 13y = 376 equ (2)
multiply equ (1) with 11 and equ (2) with 3
33x + 44y = 1188
33x + 39y = 1128
subtracting we get
5y = 60
y = 60/5 = 12
substitute y = 12 in equ (1)
3x + 4y = 108
3x + 4(12) = 108
3x + 48 = 108
3x = 108 - 48
3x = 60
x = 60/3 = 20
7x + 9y = 2480/number of days
7(20) + 9(12) = 2480/d
140 + 108 = 2480/d
248 × d = 2480
d = 2480/248
d = 10
7 men and 9 boys should work 10 days to earn 2480
hope you get your answer
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