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.

The speed of a motor boat - Teachoo.jpg

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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

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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

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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

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Question 4

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

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Question 5

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

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  1. Chapter 4 Class 10 Quadratic Equations (Term 2)
  2. Serial order wise

Transcript

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.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 (c) (20 – x) 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 (b) distance = (speed )/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(c) 𝑥^2+30𝑥−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(b) 10 km/hour Question 5 How much time boat took in downstream? (a) 90 minute (b) 15 minute (c) 30 minute (d) 45 minute(d) 45 minute

About the Author

Davneet Singh's photo - Teacher, Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.