Question

hello plz solve this question!!!

I have given u a bit more points for this question plz solve it. ​

Answer 1

Answer:

Step-by-step explanation:

Let the speed of street =xkm/h

The speed of boat in still water =11km/h

Total distance in going and coming back =12km

The speed of boat in down streem =(11+x)km/h

Up streem =(11-x)km/h

Time taken in going and coming back =4h45minutes

=4+3/4

=19/4h

According to question

12/(11+x) +12/(11-x) =19/4

Cross multiple

(132-12x+132+12x)/121-x^2 =19/4

264/121-x^2 =19/4

Cross multiple

2299-19x^2=1056

19x^2=1243

X^2=1243/19km/h

Answer 2

Arrange the following in order of decreasing oxidation number of Nitrogen.

N$H_{3}$ , $N_{3}$H , $N_{2}$O , NO, $N_{2}$$O_{5}$