Aptitude - Problems on Trains - Discussion

First convert the km into metres 60km will bcome 60000 metres then divide 60000 with 1 hour that is 60,60000/60 this will give us the speed of the train in mins n then 1000 with 60(to convert the speed in seconds)then multiply the ans with 9 seconds.ie 16.66*9 will give us 150 :)

Here we have to think that they are asking the length of train.
First we have conform that all the values given are same format or not .
if not we have to convert them into one format depending on the answers given to us.
Then it is possible to get the correct answer.

The first answer explanation by Sundar is very good .

The first answer which was given by sunder is best, even a kid can understand it well, well done sunder.

Nice trick.

The first answer is the best answer

@ Kalimuthu Thanks...I understand your solution.

Just now I know the formula for converting meter to feet. Thank you.

Sundar.

Can any one say me about pole in this question?

Sonali invests 15% of her monthly salary in insurance policies. She spends 55% of her monthly salary in shopping and on household expenses. She saves the remaining amount of Rs. 12,750. What is Sonali's monthly income?

Q. Sonali invests 15% of her monthly salary in insurance policies. She spends 55% of her monthly salary in shopping and on household expenses. She saves the remaining amount of Rs. 12,750. What is Sonali's monthly income?

Solution:

Let the monthly-salary be X.

Total %-of-amount spent = (15 + 55) = 70% of X.

Remaining amount saved is 30% of X.

Now, 30% of X = 12750. Then 100% of X = ?

X = (12750/30) x 100 = 42,500.

Required answer X = Rs. 42,500. //

Note:-

Amount Spent in Insurance (15% of X) = (15/100) x 42500 = Rs. 6,375.
Amount Spent in Shopping (55% of X) = (55/100) x 42500 = Rs. 23,375.
Amount Saved (30% of X) = (30/100) x 42500 = Rs. 12,750.

Monthly Salary = Rs. (6375 + 23375 + 12750) = Rs. 42,500.