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Govt has decided to connect Tripura and Delhi via a train service which is called 'Tripura Sundari Express' Two trains are running from Tripura and Delhi towards each other. Train from Tripura in covering a distance of 60 km takes 2 hours more than that of the train from Delhi. If Tripura doubles its speed, then it would take 1 hour less than that of Delhi. Tripura train's speed is?
A man covers 1 / 4th of the distance at the speed of 10 km / hr, next 1 / 4 covers at the speed of 20 km / hr, next 1 / 4 covers at the speed of 40 km / hr and remaining distance covers at the speed of 8 km / hr. What is the average speed of the man in whole journey?
In a bag, white mobile covers and black mobile covers are in the ratio of 4 : 7. If there are 280 black mobile covers, then how many white mobile covers are there in the bag?
A boat covers 12 km upstream and 18 km downstream covers the distance 3 h, while it covers 36 km upstream and 24 km downstream covers the distance \(6{{1} \over 2}\) hr. What is the speed of the current.
Statements : Some uniforms are covers. All covers are papers. All papers are bags.

Conclusions :
I. All covers are bags.
II. Some bags are covers, papers and uniforms.
III. Some uniforms are not papers.
Which of the following statements are true with regards to the selection of a sample size? (i) The sample size (n) may be a fixed percentage of lot size (N). (ii) The sample size (n) may be kept constant irrespective of lot size (N). (iii) Sample size (n) can be selected at the personal whim of the inspector.
Who among the following scholars applied the formula PI = \(\frac{Y}{Yn} l\frac{T}{Tn}\)  where PI = Agricultural productivity index; Y = Total production of selected crops in unit area; Yn = Total production of the same selected crops in the country; T = Total cropped area of the unit; Tn = Total cropped area in the country for measuring agricultural productivity level.
Each of the question below consists of a question and three statements number I, II and III given below it. You have to decide whether the data provided in the statement are sufficient to answer the question. Two person X and Y together can make 25% of total number of bricks in 4.8 days. Another person Z can make 50 bricks in a day. What is the time taken by person X and Z together to make the total number of bricks? I. Dimensions of a brick is (3cm × 4cm × 5cm) while the dimension of a cuboids when all the bricks are put together is (72cm × 80cm × 50cm) and ratio of number of days taken by X and Y alone to make the total number of bricks is 3 : 2. II. The total number of bricks is 4800 and person Y can make 150 bricks in day. III. Total volume of all the bricks together is 1.008m3 and dimension of a bricks is (5cm × 6cm × 7cm) and time taken by Z to make total number of bricks is 200 % more than the total time taken by person Y to make total number of bricks.
“What is the different between height and radius of solid cylinder?” Which of the following option is sufficient alone to find the answer? A) A solid cylinder is made by melting a solid sphere. The radius of cylinder is 3 times the radius of a circle whose area is 154 sq.m. Height of cylinder is equal to the height of cone whose volume is 2772 cubic meters. B) Area of a rectangle whose longer side is ¾ times the radius of a solid cylinder, is 168 sq.m and, Volume of solid cylinder is 2772 cubic meters and its height is 18 m. C) A metallic cone of radius 15m and height 35m is melted into the solid cylinder of radius equal to the radius of a circle whose area is equal to the area of rectangle whose sides are in the ratio 4 : 3 respectively. D) The curved surface area of the solid cylinder is 3 time the surface area of a sphere of radius 7m and height of cylinder is equal to the height of a metallic cone whose curved surface area is 308 sq.m. 
Which of the following statements is/are correct about Municipalities? 1. "Metropolitan area" means an area having a population of ten lakhs or more, comprised in one or more districts and consisting of two or more Municipalities or Panchayats or other contiguous areas, specified by the State Legislature by public notification to be a Metropolitan area for the purposes. 2. A Nagar Panchayat (by whatever name called) for a transitional area, that is to say, an area in transition from a rural area to an urban area;