A person travels at the speeds of 18kmph, 24kmph, and 12kmph on the surface of an equilateral triangle and the ground. Find the average speed of the entire journey. (In Kmph)
Let the side of the triangle be 72 km. As we know, Average speed = total distance/total time Time to cover 72 km distance with the speed of 18 km/hr = 72/18 = 4 hrs Time to cover 72 km distance whit the speed of 24 km/hr = 72/24 = 3 hrs Time to cover 72 km distance with the speed of 12 km/hr = 72/12 = 6 hrs Average speed = (3 x 72) / (4+ 3+6) = 216/13 = 16.6 km/hr
The number of terms needed to get Sn = 0 in the A.P of 63, 60, 57. . . . .
The mean of the sample data = 60 and median = 48. Find the mode of this distribution.
If the standard deviation of a population is 3.5, what would be the population variance?
Amish invested 2500 Rupees in each of these schemes, offering simple interest of 12% per annum. 16% P.A. and 15% PA. respectively. Find the total intere...
In an A.P 41st term is 50, then the sum of 81 terms of that A.P is:
The sum to n terms of the series 1 + 1 + 3 + 1 + 3 + 5 + 1 + 3 + 5 + 7 …………………… is
24, 29, 62, ?, 758, 3791
...3600, 600, 120, 30, 10, ?
21 is divided into three parts which are in arithmetic progression (A.P.) in such a way that the sum of their square is 179. Find the smallest part.
What will be the mode of the following data?
13, 15, 31, 12, 27, 13, 27, 30, 27, 28 and 16
