Question

4 boys and 8 girls completed 1/3rd of work in 5 days. After that 3 boys and 3 girls increased and they completed 1/3rd more work more work in 3 days. If remaining work is completed in 2 days, then how many more girls should be increased.
solve the above question​

Answer 1

Answer:

13 girls will be there

Step-by-step explanation:

there are 8 girls  and then tere are 3 girls increased in 3 days.so there is 1 girl increased in 1 day.In 2 days 2 girls will increase so 8+3+2=13 girls.

Answer 2

Answer:

30 girls

Step-by-step explanation:

Total work done by 4 boys and 8 girls

4x+8y=1/15 (i)

Total work done by 7 boys and 11 girls

7x+11y=1/9 (ii)

Total work done by 7 boys and (11+a) girls

7x+(11+a)y=1/6 (iii)

solving eq (i) and(ii) we get

x=7/540 y=1/540

substitute x,y values in eq (iii)

we get a=30