Question
A, B, and C can complete a work in 12, 16, and 24 days
respectively. B and C worked together for 4 days then C left work and A replaced him. In how many days will the remaining work be completed?Solution
LCM of 12, 16 and 24 is 48. Efficiency of A = (48/12) = 4 units/day Efficiency of B = (48/16) = 3 units/day Efficiency of C = (48/24) = 2 units/day Time taken by B and C together for 4 days = [4 x (3 + 2)] = (4 x 5) = 20 units The remaining work = (48-20) = 28 units Now, Time taken by B and A to complete the remaining work = [28/ (3 + 4)] =28/7 days = 4 days The required time is 4 days.
Which of the following is the justification that aligns text on both margins of a document in Word?
If both the equations I and II given below are added, then find the product of roots of newly formed equation.
I: 3x2 + 9x + 5
...
The ratio between the speed of a bus and train is 15:27 respectively. Also, a car covered a distance of 720 km in 9 hours. The speed of the bus is three...
Two places X and Y are 450 km apart. A truck leaves place X from place Y and at the same time another truck leaves place Y to X. Both the men meet 9 hou...
If x and y are the roots of x2 + x + 3 = 0, then (x11 + y11)/(x-11 + y-11) is equal to:
The main folder on a storage device is known as
If the product of roots of equation x2 - 3(2p+4)x + (p2 - 24p + 145) = 0 is unity, then 'p' can take the values as
A train of length 260 m crosses another train of length 120 m running is opposite direction in 5 sec. If speed of longer train is 90 km/h, then in what ...
The question consists of four statements: I, II, III and IV given below it. You have to decide whether the data given in which of the following statemen...
A and B are the roots of equation x2 - 13x + k = 0. If A - B = 5, what is the value of k?
Relevant for Exams:
