Question
What is the speed of stream? IĀ Ā Sum of time
taken by a boat in upstream and downstream is 46 hrs to cover distance 460 km in each.Ā IIĀ Speed of boat in downstream is 50km/h.Ā III Boat cover 25 km in 2 hr, while rowing in upstream The following questions are accompanied by three statements I, II, and III. You have to determine which statements(s) is/are sufficient/necessary to answer the questions.Solution
From (I),Ā let theĀ Upstream Speed = x km/h,Ā Let the Downstream Speed = y km/h 460/x + 460/y = 46 1/x + 1/y = 1/10Ā From (II), we will get, y = 50, x = (50 Ć 10)/(50 ā 10) = 12.5 km/hĀ From (III), we will get, x = 25/2 = 12.5 y = (12.5 Ć 10)/(12.5 ā 10) = 50 km/hĀ Therefore Speed of Stream will be = (50 ā 12.5)/2 = 18.75 km/h So, Any two statements are sufficient to answer the question
Which of the following statements is true about Entomology?
āClippingā the tips of the rice seedling before transplanting reduces the infestation of __________
The silkworm larva ceases to eat and begins spinning silk all over its body from ____
Which of the following statements is true for Entomophagy?
Which of the following insects is the carrier of grassy stunt pathogenic virus?
What is the term used to describe the average density of a pest population around which it fluctuates due to biotic and abiotic factors in the absence o...
Ā Apis mellifera is also known as
Which of the following is correctly matched ?
This Chemical known as āApple Factorā which is released by Malus sp. and acts as an attractant to Aphis pomi is:
This leg type is observed in insects like the praying mantis, featuring spiny femurs and tibiae that interlock to form a gripping mechanism
Relevant for Exams:
