Question
Train ‘A’ can cross a pole in 8 seconds and a 140
metre long platform in 12 seconds. If the ratio of length of train ‘A’ and train ‘B’ is 2:5, respectively, then find the time taken by train ‘B’ to cross a pole with a speed of 25 m/s.Solution
Let the length and speed of the train ‘A’ be ‘l’ metre and ‘s’ m/s, respectively. According to question, l = 8s Also, 12s = 8s + 140 Or, 4s = 140 Or, s = 35 Therefore, length of train ‘A’ = 8s = 280 metres Length of train ‘B’ = 280 × (5/2) = 700 metres Required time taken = 700 ÷ 25 = 28 seconds
40% of employees in a company are managers and the rest are staff. 50% of managers and 75% of staff were promoted. Find the ratio of the number of manag...
If salary of Sunil is 30% more than that of Manish, then salary of Manish is how much percent less than that of Sunil? [correct upto two decimal places]
Income of Neel is 20% more than the expenditure of Kabir. Income of Kabir is 33⅓% more than the expenditure of Neel. If savings of Kabir is Rs. 1,000 ...
In a school election for the position of president, two students were competing. Among the eligible voters, 80% participated by c...
A person gives 20% of his salary to his wife and 25% of the remaining to his children. Now he is left with Rs. 27000. What is his total salary?
There were two candidate in an election. 15% of the total voters did not cast their votes whereas 10% of the casting votes were declared invalid. If th...
'V' sold 40% fewer candies than 'P' did. The ratio between the quantity of candies sold by 'V' and 'B' is 4:7. If 'B' sells 630 sweets, get the number o...
In an election between two candidates, winner got 65% of total valid votes. If total number of votes cast were 2000 out of which 6% were invalid, then f...
In a colony, there are 60 APL families and 30 BPL families. Each APL and BPL family got blankets equal to 22% and 70%, respectively of total number of f...
- ‘M’ has 15% less balls than ‘N’. ‘N’ has 10% more balls than ‘O’. By how much percent the number of balls with ‘M’ are less than those ...
Relevant for Exams:
