Let the efficiency of woman and that of a girl be 'X' units/day and 'Y' units/day respectively. Time taken by 2 women and 5 girls together to complete the entire work = 9 × 2 = 18 days Then, total work = (3X + Y) × 25 = (2X + 5Y) × 18 Or, 75X + 25Y = 36X + 90Y Or, 39X = 65Y So, X:Y = 65:39 = 5:3 Let 'X' = '5a' and 'Y' = '3a' Then, total work = (5a × 3 + 3a) × 25 = '450a' units 40% of the total work = 450a × 0.4 = '180a' units Time taken by 1 woman and 1 girl together to complete 40% of the work = 180a ÷ (5a + 3a) = (180a/8a) = 22.5 days
Ashish and Anil can do a piece of work in 10 days and 15 days respectively. Ashish completed 40% of the work. Find the time taken by Anil to complete th...
‘A’ alone can complete a work in 15 days while ‘A’ and ‘B’ together can complete the same work in 10 days. How much percentage of the work, ...
P’s 5 days work is equal to Q’s 6 days work. If P and Q together can complete the work in 25 days then how much time Q will take to complete 60% of ...
The efficiency of C is 20% more than the efficiency of D. D alone can complete a piece of work in (y-2) days. The time taken by C alone to complete the ...
Ram, Ankit and Shivam together can do a piece of work in 10/3 days. Ram could do it alone in 6 days and Ankit could do it alone in 12days. In how many d...
A can complete a piece of work in 27 days. He worked for 21 days and then B finished the remaining work in 8 days. In how many days can A and B finish t...
(y+40) boys can do a piece of work in (z-20) days. (y-5) boys can do the same piece of work in (z+20) days. If (y+30) boys can do the same piece of work...
Ratio of the work done by P, Q and R in one day is 5:3:7 respectively. They all together can complete the work in 35 days. Q and R worked on it for 20 d...
Neha can do a work in 45 days while Meha can do the same in 90 days. If Neha works for 'q' days while Meha works for 'q + 2' days then one-sixth of the ...
Working alone, B can complete the work in 30 days. C is twice as efficient as B and A takes 20 days more than it takes C to complete the work. Working t...
