Question
200 metre long train lsquo;Arsquo; is running with a
speed of 72 km/hr. Train lsquo;Brsquo; which is 290 metre long is running with a speed of 90 km/h in opposite direction of train lsquo;Arsquo;. For how much time, the smaller train is completely obscured by the larger train when they cross each other?Solution
Length of smaller train = 200 metre Speed of smaller train = 72 times; (5/18) = 20 m/s Length of bigger train = 290 metres Speed of bigger train = 90 times; (5/18) = 25 m/s Since, the smaller train is completely obscured by larger train, therefore, extra length of larger train = 290 ndash; 200 = 90 metres Relative speed of trains lsquo;Arsquo; and lsquo;B lsquo;= 20 + 25 = 45 m/s (Since, the trains are running in opposite direction) Required time = 90/45 = 2 second
The ratio of incomes of A and B is 5 : 7. Each of them saves Rs 600 per month. The ratio of their expenditures is 3 : 5. What is B's monthly income?
Among 132 examinees of a certain school, the ratio of successful to unsuccessful students is 9 : 2, Had 4 more students passed, then the ratio of succes...
If the ratio of income of Aman and Rahul is 5:4 and the ratio of their expenses is 3:2 and each saved Rs 1600 then find the income of Aman.
A factory manufactures three types of products: X, Y, and Z. The average production rates are 50Β units per hour for product X, 80 units per hour for p...
A company has 600 male employees and 400 female employees. When (x + 50) males and 2x females are recruited, the ratio becomes 7:5. Find the value of οΏ½...
If A:B = 4:5 and C:B = 3:4, then determine the value of (A:B:C) .
A boy is supposed to distribute Rs.4400 among his three friends P, Q and R in the ratio of 4:2:5 respectively, but mistakenly he distributed in the rati...
- In a park, the ratio of adults to children is 7:5. If the number of adults was decreased by 21 and children increased by 14, then their numbers become equa...
- A total amount of βΉ24,750 is divided among βMβ, βNβ, βOβ, and βPβ in the ratio of 4:7:5:6. What is the share of βNβ?
Relevant for Exams:
