Speed of the shorter train = 150/12 = 12.5 m/sec Let the speed of the longer train be x km/hr According to the question, ⇒ (12.5 + x) = (150 + 270)/14 ⇒ 12.5 + x = 420/14 ⇒ x = 30 – 12.5 = 17.5 ⇒ x = 17.5 x 18/5 = 63 km/hr
Aman' and 'Bhuvan' can complete a certain task in 24 days and 40 days, respectively. Both started working together, but 'Bhuvan' ...
Quantity I: A student multiplied a number by 3/5 instead of 5/3 . What is the % error in the calculation?
Quantity II: The population of a town i...
What is the population of village A in 2021?
Quantity I: Population of village A in 2020 was 56,000 and it increased by 20% in 2021 over 2020.
The cost price (CP) of an article is Rs. 700, and it is marked at a price that is 'p%' above the CP. The article is sold after of...
Quantity I: A bag contains 5 identical gold coins, and the number of ways in which 'p' coins can be drawn from the bag is 10. D...
Quantity I : The rate at which the train must run to reduce the time to 30 minutes. A train takes 40 minutes for a journey if it runs at 72 km/hr.
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A sum of Rs.12000 was lent partly at 5% and partly at 3% simple interest. The total annual interest be Rs.450.
Quantity I. Part lent at 5% SI.
How many litres of liquid A was contained by the Can initially?
Quantity I. A Can contains a mixture of two liquids A and B in the ratio 7: 5. W...
After a discount of Rs.63, item 'chips' is sold for 40% more than its cost, yielding a 22% profit. After a 10% discount, item "cold drinks," which has a...
