Question

The speed of a motor boat is 20 km/hr. For covering the distance of 15 km the boat took 1 hour more for upstream than downstream. Which is the correct quadratic equation for the speed of the current?
a) x2 + 30x − 200 = 0
b) x2 + 20x − 400 = 0
c) x2 + 30x − 400 = 0
d) x2 − 20x − 400 ​= 0
Please Explain Step by Step​

Answer 1

Answer:

correct answer is a

Step-by-step explanation:

20 km/hr = X2 +30x-200 = 0

Answer 2

answer is option a)

Step-by-step explanation:

a) x2 + 30x − 200 = 0