Question
The time taken by train B to cross a platform of 120
metres is 3 sec less than the time taken by train A to cross the same platform. The sum of length of train A and B is 600 metres. The ratio of speeds of trains A and B is 3:2 respectively. Find the speed of train B.Solution
ATQ,
Let the length of train A = LA and length of train B = LB respectively, Speed of train A = 3x, Speed of train B = 2x.
From the problem:
Substitute LB = 600 − LA into the equation and simplify: 2LA − 3LB − 120 = 18x,
Solve to get LA = 18x/5 + 384. Use this relation to calculate 'x' or LA with additional constraints or assumptions about 'x' is not mention Hence, it Can't be determined
Mahesh ranked 17th from the top and 31th from the bottom among those who passed an examination. 5 boys did not participate in the competition and 4 fail...
If 'B' is coded as '4' and 'BALL' is coded as '44', then how will 'BALLOON' be coded?
Five friends S, T, U, V and W having different height. U is taller than only one person. W is neither the tallest not shortest. There are two persons wh...
Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.
3480 : 59 :: 4623 : ?
Four letter- clusters have been given, out of which three are alike in some manner, while one is different. Choose the odd one.
There are 38 persons in a row, in which A is 8th from the left and B is 12nd from the right side of the row. Find out no of people between A and B.
What can be the possible age of V?
Five persons N, P, R, U and Y have different weights. Only one person has more weight than Y. P is heavier than U but not the heaviest. Weight of second...
There are five persons Priya, Mohini, Chetna, Alka and Garima, who have different heights. Priya is taller than Garima but shorter than Alka. Chetna is ...
