Question
A contractor undertook to make 20 km of roadway in 48
weeks. In 28 weeks, 8 km was completed by 120 men working 12 hours a day. The men then agreed to work 3 hour a day overtime and some women were engaged to assist them, the work was finished in the stipulated time. How many women were employed, if the work of 8 men is equal to that of 5 women.Solution
8M = 5W So M/W = 5/8 By M1D1H1/W1 = M2D2H2/W2 (120M × 12 × 28)/8 = [(120M + xW) × 15 × 20]/12 (120×5 × 12 × 28)/8 = [(120×5 + x×8) × 15 × 20]/12 28×3×12 = 600 +8x 8x = 1008 - 600 = 408 So x = 408/8 = 51
More Time and work Questions
33 34 37 42 48 58
121, 118, 122, 115, 127, 112
210, 140, 105, 84, 70, 63, 52.5
150, 900, 300, 1800, 600, 3700, 1200
126 130 114 150 82 186 42
...1000, 200, 56, 24, 12, 7.2
120, 139, 196, 291, 420, 595
6, -3, 11, 21, 125, 715
Find the wrong number in given number series.
1520, 1760, 2120, 2720, 2840, 2560
213, 215, 225, 257, 313, 393