Question
A train of length (L + 90) meters crosses a man running
in the same direction in 30 seconds. The same train crosses a bridge of length (L - 210) meters in 36 seconds. If the speed of the man is 18 kmph, then find the value of 'L'.Solution
Let the speed of the train be 'S' m/s,
Speed of the man = 18 kmph = 5 m/s
Length of the train = (L + 90) metres
ATQ,
L + 90 = (S - 5) X 30
L = 30S - 240 --- (i)
Sum of the length of Train and bridge = L + 90 + L - 210
= (2L - 120) metres
Now,
2L - 120 = 36S
Using value of 'L' from equation (i), we get:
2 X (30S - 240) - 120 = 36S
Or, 60S - 480 - 120 = 36S
Or, 24S = 600
So, 'S' = 25
Required value of 'L' = 30 X 25 - 240 = 510
There taking it (A) / in the way they (B) / did irritated me. (C) / No error (D)
Read each sentence to find out whether there is any grammatical or idiomatic error in it. The error, if any, will be in one part of the sentence. The n...
Read each sentence to find out whether there is any grammatical error in it. The error, if any, will be in one part of the sentence. Mark the part with...
Directions: Identify the grammatical errors in the context of the given sentence. If there is no error, choose option 5, i.e., No error. (Ignor...
There is a barrier among the egghead and (1)/ the hoipolloi and it would be lazy (2)/ idealism to ignore it. (3)/ No error (4)
At his birth, it was predicted  (1) / that he will grow up (2) / to be a world ruler but it was not clear(3) / whether this would be politica...
Directions : In the question given below, a sentence is given, divided into parts. One of the parts may contain an error. Identify the part that contai...
The following sentence has been split into four segments. Identify the segment that contains a grammatical error.
She suggested that we should (...
Find the appropriate ERROR
The most unromantic neighbourhood that a child could be possible to live in has given me some of the fondest memories of my life.
Relevant for Exams:
