Question
A motor-cycle covers 130 km with a speed of 50 km/hr.
find the speed of the motor-cycle for the next 130 km journey so that the average speed of the whole journey will be 75 km/hr.Solution
Average speed of whole journey = 75 km/hr Using the formula, average speed = 2xy/(x + y)  x = speed of first 130 km = 50 km/hr 75 = 2 x (50 x y)/(50 + y) = 150 km/hr
How many persons are seated in a table (Including unknown persons)?
A, B, C, D, E and F are sitting in a row. E and F are in the centre. A and B are at the ends. C is sitting to the left of A. Who is to the right of Piyush?
Which of the statement is true?
How many persons sitting between D and C?
How many persons sits between E and B when counted anticlockwise from E?
If all the persons are made to sit in alphabetical order in a clockwise direction with respect to A, then how many persons remain unchanged in their po...
What is the position of Z with respect to O?
What is the position of R with respect to the one who sits to the immediate right of W?
Eight persons A, B, C, D, E, F, G and H sit in a row facing north direction. F sits second to the left of D, who is not extreme right end. C is second p...
What is A’s position with respect to B?
Relevant for Exams:
