Question
Trains 'M' and 'N' travel at speeds of 72 km/h and 90
km/h, respectively. It takes train 'M' 32 seconds to pass a certain platform, while train 'N' requires only 24 seconds to cross the same platform. Determine the length ratio of train 'M' to train 'N'.Solution
Let the length of the platform be ‘x’ metres Let the length of trains ‘M’ and ‘N’ be ‘a’ metres and ‘b’ metres, respectively According to the question, 72 × 5/18 = (x + a)/32 20 × 32 = x + a Or, x + a = 640 Or, x = 640 – a.….. (1) Also, 90 × 5/18 = (x + b)/24 25 × 24 = x + b Or, x + b = 600 Or, x = 600 – b…… (2) From equations (1) and (2), we get 640 – a = 600 – b Or, a – b = 40 Therefore, required ratio cannot be determined. Hence, option d.
A, B, C, D, J, K, L and M are sitting around a square table facing the centre of the table. Four of them are sitting at either of the corners while the ...
Six friends are sitting in a circle. All of them are facing the centre. Kanak sits third to the right of Sona. Kapil is an immediate neighbour of Mani. ...
Select the set in which the numbers are related in the same way as are the numbers of the following sets.
(NOTE : Operations should be performed ...
Find the wrong number in the following number series:
1250, 500, 200, 80, 30
In order to go to University, Prakash started from his house in the east of the town and came to a crossing. The road to the left ends in a theatre and ...
Which letter-cluster will replace the question mark (?) to complete the given series?
MMNO, OKPM, ?, SGTI, UEVG
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance...
Four words have been given, out of which three are alike in some manner and one is different. Select the one that is different.
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series. PHW, SKZ, WOD, BTI, ?
Seven boxes A, B, C, D, E, F and G are kept one over the other but not necessarily in the same order. Only three boxes are kept above A. Only one box is...
Relevant for Exams:
