Let the speed one train be x m/s and the speed of the second train be y m/s. Length of the first train = Speed × Time = 36x Length of second train = Speed × Time = 21y So, {(36x + 21y)/(x+y)} = 27 ⇒ 36x + 21y = 27x + 27y ⇒ 9x = 6y Therefore, x:y = 2:3
A number is three times another number and their HCF is 8. What is the sum of the squares of the numbers?
In two alarm clocks, alarms sound at regular intervals of 90 seconds and 44 seconds. If they ring for the first time at 6:00 PM, when will they next r...
The L.C.M of a² – 2a – 3 and a³ + a² + a + 1 is
Sum of the two numbers is 80. LCM and HCF of that two number is 168 and 8 respectively. Find the difference of the numbers?
If the product of two numbers is 80 and their HCF is 5, then find the LCM of the given two numbers.
HCF of two numbers 60 and 100 can be expressed in the form of (25m – 80) whereas LCM of these two numbers can be expressed in the form of (40n – 20)...
What is the minimum number of square marbles required to tile a floor of length 2 metres 8cm and width 2 metres 86 cm?
