6 girls and 3 boys can finish a certain piece of work in 12 days while 2 girls and 3 boys can finish same work in 20 days what is time to taken by a boy alone to finish the work
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Answer:
One boy can finish the work in 8 days
Step-by-step explanation:
6x+3y=12
2x+y=4---------1
2x+3y=20---------2
2x+12-6x=20
4x=-8
x=-2
-4+y=4
y=4+4
y=8
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