Question
X can do a certain work in 84 days. Y in 50% less
efficient than X while Z takes 28 days to do the same work. To complete the work, Y started the work, X joined him after 3 days and Z joined them after 7 days from the beginning. For how many days did Z work to complete the work?Solution
1 Day work of X = 1/84 th part of work 1 Day work of Y = 1 /168th part of work 1 Day work of Z = 1/28 the part of work 1 1 Day work of X and Y together =1/84 + 1/168 = 1/56 th part of work 1 Day work of X, Y and Z 1 together = 1/84 +1/168 +1/28= 3/56th part of work For 3 days, Y worked alone and completed = 3 x 1/168 =1/56th part of work 1 For next 4 days, X and Y worked together and completed = 4 ×1/56 =1/14 the part of work Now, remaining work after 7 days 
Which state does NOT include any part of the Chota Nagpur Plateau?
Which area is referred to as the Konkan coast?
Consider the following statements:
1. In an antecedent drainage pattern, the river cuts through uplifted portions of land.
2. In a superim...
Boundary line between Germany and Poland
The Tropic of Cancer (23°30' N) passes through which states of India?
Which of the following methods can help in preventing soil erosion?
1. Contour bunding
2. Cover cropping
3. Gully plugging <...
Consider the following pairs:Â
Hills               Region
1. Cardamom Hills   Coromandel Coast
...
Which state is known as the "Spice Garden of India"?
What is common to the places known as Aliyar, Isapur and Kangsabati?
Arrange the following peaks from East to West based on their geographical locations:
1. Mount Everest
2. Mount Denali
3. Mount Kilimanjaro
4. Mount Elbrus
