Let the total work = 120 units Efficiency of (X + Y) = 120/10 = 12 units/day Efficiency of (Y + Z) = 120/8 = 15 units/day Efficiency of ‘Y’ = 120/12 = 10 units/day Efficiency of (X + Y + Z) = (12 + 15 – 10) = 17 units/day Required time taken = (0.65 × 120)/17 = 5 days (approx)
In a class, 3/5 of the students are girls and rest are boys. If 2/9 of the girls and 1/4 of the boys are absent. What part of the total number of studen...
The incomes of A and B are in the ratio of 3:2 and their expenditures are Rs. 14,000 and Rs. 10,000 respectively. If A saves Rs. 7000, then B's savings ...
The ratio of the monthly incomes of A and B is 11: 13 and the ratio of their expenditures is 9: 11. If both of them manage to save ₹4,000 per month, t...
A invested a certain amount in Debt and Equity mutual funds in the ratio of 5: 6 respectively. At the end of one year, he earned a total dividend of 40%...
A student's scores in four subjects are in the ratio 3:4:5:6. The student achieved an overall average of 72% on the exam. If the maximum possible score ...
At a birthday party, 160 children attended. They were divided into boys and girls. A total of 1240 candies were distributed. If e...
The number of boys and girls in a school is 140 and 250 respectively. 30% of boys left the school while 30 girls took admission in the school. Find the ...
A school has a total of 600 students. The ratio of boys to girls is 3:5. If 40% of the boys and 20% of the girls participated in a sports event, how man...
If the base radius of 2 cylinders are in the ratio 3 : 4 and their heights are in the ratio 4 : 9, then the ratio of their volumes is:
