Question

यादिaतथा,b
$x^{2} + 2x + 1$
के शुन्यक है तो1/a+1/B​

Answer 1

Answer:

Let Speed of boat =X km/hr

Speed of stream =Y km/hr

Speed of downstream (X+Y)=72/8=9km/hr

Speed of upstream (X-Y)=84/12=7km/hr

X+Y=9

X-Y=7

Using elimination method

X=8

Y=1

Answer speed of boat =8km/hr

Speed of stream =1km/hr

Step-by-step explanation: