Question 2 - Case Based Questions (MCQ) - Chapter 4 Class 10 Quadratic Equations

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.

Question 1

Let speed of the stream be x km/hr. then speed of the motorboat in upstream will be
(a) 20 km/hr
(b) (20 + x) km/hr
(c) (20 – x) km/hr
(d) 2 km/hr

Question 2

What is the relation between speed ,distance and time?
(a) speed = (distance )/time
(b) distance = (speed )/time
(c) time = speed x distance
(d) speed = distance x time

Question 3

Which is the correct quadratic equation for the speed of the current ?
(a) x ² +30x-200=0
(b) x ² +20x-400=0
(c) x ² +30x-400=0
(d) x ² -20x-400=0

Question 4

What is the speed of current ?
(a) 20 km/hour
(b) 10 km/hour
(c) 15 km/hour
(d) 25 km/hour

Question 5

How much time boat took in downstream?
(a) 90 minute
(b) 15 minute
(c) 30 minute
(d) 45 minute