will it be 64?? duration = k*d/v v= m*(q^1/2)/ no. of carriages from data given,, k/m=1/3 also 28=k*42/v 42k/28 = m* (q^1/2)/16 use k/m=1/3 to find q=64
The duration of a railway journey varies as the distance and inversely as the velocity; the velocity varies directly as the square root of the quantity of coal used per km, and inversely as the no of carriages in the train. In a journey of 50 KM in half an hour with 18 carriages, 100 kg of coal is required. how much coal will be consumed in a journey of 42 KM in 28 minutes with 16 carriages.
will it be 64??
duration = k*d/v
v= m*(q^1/2)/ no. of carriages
from data given,, k/m=1/3
also
28=k*42/v
42k/28 = m* (q^1/2)/16
use k/m=1/3 to find q=64
It is during our failures that we discover the true desire for success
Bhola starts walking towards the temple from his house. After covering one-fourth of the total distance to the temple he doubles his original speed. When he has walked half the total distance he increases his speed to three times his original speed and walks for another one-fourth of the total distance at this speed. For the remaining distance he increases his speed to four times his original speed. While coming back to his house he covers the entire distance at his original speed. If Bhola walks for 2 hours and 26 minutes in all, then for how much time does he walk at thrice his original speed?(a) 24 min (b) 8 min (c) 6 min (d) Cannot be determined
8 min hai kya??
d/4x + d/8x + d/12x + d/16x + d/x = 146 mins
d/x=96 mins
time taken when he walks thrice his speed =d/12x= 96/12 = 8??
It is during our failures that we discover the true desire for success
ABC is a 3 digit number with distinct digits. If it is known that 3 Ă— ABC is equal to another 3 digit number CCC, then what is the value of B?(a) 1 (b) 3 (c) 5 (d) 8
8??
3*ABC=CCC
C can be 1,5 or 0,
0 not possible With 111 ABC becomes 2 digit number which is nt reqd
with 555 ,,ABC becomes 185
so B=8
It is during our failures that we discover the true desire for success
i guess all the terms will not cancel each other ,,the last term,,dat is 1/(n+1) remains,, but it will be negligible when tends to infinity,, so 1 - 1/(n+1) = 1,,i guess
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