Question
Train A running at speed of 90 km/hr crosses a platform
having twice the length of train in 12 sec. Train B whose length is 340m crosses same platform in 18 sec, then find the speed of train B ?Solution
Let length of train A = x Length of platform = 2x Speed = distance/time ⇒ 90 x 5/18 = (x + 2x)/12 ⇒ x = 100 m = length of train A Length of platform = 100 x 2 = 200m For train B, Speed = distance/time ⇒ (200 + 340)/18 x (18/5) ⇒ 108 km/hr
A, B and C started a business with initial investments in the ratio 3:4:8, respectively. After one year A, B and C made additional investments equal to ...
Three partners Karan, Arjun and Mukesh invest Rs 75,000, Rs 90,000, Rs 1,05,000 respectively in a business. Karan receives 12.5% of the profit as Manage...
A and B invested Rs.3000 and Rs.6000 in a business respectively and after 5 months B withdrawn 50% of his initial investment and again after 5 months he...
‘Ravi’ and ‘Sameer’ invested Rs. ‘y’ and Rs. ‘1.5y’ in a business respectively. After four months, both of them increased their investme...
Three people – R, S and T – began a partnership. R invested 35% more than T, and S invested 65% more than T. If the total yearly profit is Rs. 28000...
‘M’ started a business with an investment of Rs. 4500. After 2 months ‘N’ joins the business with an investment of Rs. 3000. If the total profit...
‘A’ and ‘B’ started a business by investing certain sum in the ratio 5:4, respectively for 6 years. If 19% of the total profit is donated in an ...
- ‘D’ started a business by investing Rs. 1,600. Seven months later, ‘E’ joined him by investing 50% of D’s capital. If total profit after one year...
'A' and 'B' started a business with an investment of Rs. 2,000 and Rs. 2,500, respectively. After 6 months, 'C' joined them with an investment of Rs. 3,...
A invests Rs. (P + 800). After four months, B joins with Rs. 3P. If the ratio of B’s annual profit share to A’s is 6:5, find (P − 200).
Relevant for Exams:
