Get Started with ixamBee
Start learning 50% faster. Sign in now
Get Started with ixamBee
Start learning 50% faster. Sign in nowLet’s assume the speed of the boat in still water and the speed of the stream are ‘B’ and ‘C’ respectively.
A boat can cover ‘y’ km distance downstream in (t+2.5) hours.
(B+C) = y/(t+2.5)
y/(B+C) = (t+2.5) Eq.(i)
The same boat can cover ‘0.25y’ km distance upstream in ‘t’ hours.
(B-C) = 0.25y/t
0.25y/(B-C) = t
y/[4(B-C)] = t
y/(B-C) = 4t Eq.(ii)
If the total time taken by the boat to cover ‘y’ km distance downstream and the same distance upstream is 65 hours.
(y/(B+C))+(y/(B-C)) = 65
Put Eq.(i) and Eq.(ii) in the above equation.
(t+2.5)+4t = 65
5t+2.5 = 65
5t = 65-2.5
5t = 62.5
t = 12.5 Eq.(iii)
The time taken by the boat to cover 728 km in still water is (2t+3) hours.
728/B = (2t+3)
Put the value of ‘t’ from Eq.(iii) in the above equation.
728/B = (2x12.5+3)
728/B = (25+3)
728/B = 28
728/28 = B
B = 26 Eq.(iv)
Put the value of ‘B’ and ‘t’ in Eq.(i) and Eq.(ii).
y/(26+C) = (12.5+2.5)
y = 15(26+C) Eq.(v)
y/(26-C) = 4x12.5
y/(26-C) = 50
y = 50(26-C) Eq.(vi)
Equating Eq.(v) Eq.(vi).
15(26+C) = 50(26-C)
3(26+C) = 10(26-C)
78+3C = 260-10C
13C = 260-78
13C = 182
C = 14
So the speed of the stream = 14 km/h
The process of removal of undesirable or non-productive animals from herd is called……………………
…………………………….is the prominent member of 1:1 type group in which one tetrahedral and one octahedral layer is present.
...Orobanche is _____ type of parasitic weed.
The light-dependent reactions of photosynthesis take place in the:
Which of the following is not a function of Auxin?
Golden rice, which is genetically modified, is rich in:
Epiricania melanoleuca, an ectoparasitoid is effective against
_________ plants are characterized by seeds having two cotyledons, reticulate venations in leaves, and tetramerous or pentamerous flowers.
...Which of the following is NOT an objective of drip irrigation?
Etawah Pilot Project was launched under the leadership of
