Question
A boat takes 28 hours for travelling downstream from
point A to point B and coming back to point C midway between A and B. If the velocity of the stream is 6km/hr and the speed of the boat in still water is 9 km/hr, what is the distance between A and B?ÂSolution
Downstream speed = 9+6 = 15 Upstream speed = 9-6 = 3 Now total time is 28 hours If distance between A and B is d, then distance BC = d/2 Now distance/speed = time, so d/15 + (d/2)/3= 28 Solve, d = 120 km
Select the pair in which the numbers are related to each other in the same way as are the numbers in the given pairs. (NOTE: Operations should be perfor...
Find the odd one out.
Statements:
All blacks are white.
Only a few whites are red.
No red is yellow.
Conclusions:
I). Â Some whites ar...
'A $ B' means 'A is the parent of B'. A # B' means 'A is the brother of B'. 'A @ B' means 'A is the grandfather of B'. 'A & B' means 'A is the son of B'...
Select the option that is related to the third word in the same way the second word is related to the first word.
Mimic: Imitate :: Meander: ?If A @ B means A is the spouse of B. A # B means A is the sister of B. A $ B means A is the brother of B. A % B means A is the son of B. If 'B % C @ D $...
There are six persons, Z, N, A, D, H and V in a family. V is the paternal grandmother of Z. A is the sister of H. N is the father of A. Z is the only so...
What will come in the place of '?' in the following equation, if '+' and '-' are interchanged and ' X ' and '÷' are interchanged?
8 - 6 ÷ 12 + ...
Heera likes which of the following colour?
Relevant for Exams:
