Question
3 women and 1 girl together can complete a work in 25
days. 2 women and 5 girls can together complete half of the same work in 9 days. Find the time taken by 1 woman and 1 girl together to complete 40% of the entire work.Solution
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
Which method measures soil moisture content by drying a sample in an oven and determining the percentage of moisture loss?
The indicator plant for zinc deficiency is ____
The acidic soils can be reclaimed by the application of ____
Disorders like Hollow Stem of Cauliflower; Browning of Cauliflower ; Top sickness of Tobacco is caused due to the deficiency of
Under Soil Health Card Scheme, what is the cycle of testing of soil for irrigated area and area from which single sample is to be drawn?
Reward of land is
The major microorganism that is considered most important as an indicator of soil quality is:
Flooding is the method used for the reclamation practice in which of the problematic soil?
The soil amendment used for the reclamation of Sodic soil is
Which one of the following soil orders has the highest area in India?
Relevant for Exams:
