Question

Vibha, a student of class X goes to Ganga river with her father. When she saw a boat in the
river, she wishes to sit on it and her father agrees. They sit on a boat which goes upstream
at a speed of 10 km/h and downstream at a speed of 14 km/h. Then answer the questions
which arise in Vibha’s mind.

(i)
Find the speed(in km/h) of the boat in still water.

a) 8 b) 10 c) 12 d) 14

(ii)
Find the speed(in km/h) of stream.

a) 2 b) 3 c) 4 d) 5

(iii) Which mathematical concept is used in above problem?

a) Cross multiplication method

b) Pair of linear equations

c) Factorization method

d) None of the above

(iv) Write the direction in which the speed is maximum.

a) Upstream b) downstream

c) Both have equal speed d)None of these

(v)
Find the average speed (in km/h) of stream and boat in still water.

a) 7 b) 10 c) 12 d) 5

(plz give the proper answer with solutions.) ​

Answer 1

Answer:

I am so sorry these much big question

Answer 2

search it

1st ans 12

2nd ans idk