Question
A train takes 22 seconds to cross a platform and 9
seconds to cross a pole. If the length of the train is 50 metres less than the length of the platform, then find the length of the platform.Solution
ATQ, Let the speed of the train be ‘x’ m/s. Length of the train = 9 × x = ‘9x’ metres So, length of the platform = (9x + 50) metres ATQ; (9x + 50 + 9x) ÷ 22 = x Or, 18x + 50 = 22x Or, 50 = 4x So, x = 12.5 Therefore, length of the platform = (12.5 × 9) + 50 = 162.5 metres
Arjun sets aside 20% of his monthly earnings. If his monthly expenses rise by 45% while his monthly savings remain constant, determine the % increase in...
Monthly income of P is Rs.20000 and his monthly savings is Rs.12000. If his monthly income is decreased by 40% and monthly expenditure is decreased by 3...
Which of the following represent a 20% increase and a 10% decrease, respectively?
If X = 75% of Y and Y = 125% of Z, then find the ratio of X to that of Z.
In the Reebok factory, there are two units of workers, I and II, with a strength ratio of 2:1. The ratio of male to female in Unit I is 3:1, and in Unit...
The income of P is 3/5th of the income of Q and income of R is 30% more than the income of Q. Income of Q is Rs.30000 and expenditure of P is...
A train there are as many wagons as there are number of seats in each wagon. In one of the wagon carrying 25 persons is filled with 71(3/7)% of its capa...
Anju spends 16% of her monthly income on rent, 22% of it on groceries, 14% of it on children's education and 50% of the remaining on other items. If ₹...
A and B are two numbers. Their average is 360, and the sum of A and B is 140% of A. What percentage of A is the difference between A and B?
- In a qualifying test, the passing marks are 60%. Marks obtained by ‘G’ are 5% less than passing marks, and ‘H’ scores 28% marks less than G. What p...
Relevant for Exams:
