Question
A train would take 20 seconds to cross a stationary
pole. If the train was 200m shorter, it would have taken 10 seconds less. Find the speed of the train.Solution
Let the original length of the train = x m ∴ Speed of the original train = x/20 m/s ∴ Length of the shorter train = (x - 200) ∴ speed of the shorter train = (x - 200)/10 m/s Since, both the train are same their speed are also same. ∴ `(x)/20 = (x-200)/10` => 10x = 20x - 4000 => 10x = 4000 => x = 400 ∴ Speed = x/20 = 400/20 = 20m/s
- Choose the most appropriate option to fill in blank number 3.
Find the appropriate word.
Fill in blank 61 with the most appropriate word.
1. We must recognize that politics
P. about the careers and fortunes
Q. citizens and not
R. and elections are about
S. the l...
The Prime Minister ___________ that the country could only _______ economically if planners had a clear _______ of rural development in the context of g...
Even small oysters can produce reasonably large pearls, although the older and larger the shell, the great the chance of finding a good-sized pearl.
Find the appropriate word.
Select the most appropriate option to fill in blank
Find the appropriate word.
Choose the most appropriate option for blank no. 5
Relevant for Exams:
