Question
The downstream and upstream speeds of a boat are 36 km/hr
and 28 km/hr, respectively. If the boatman covers (x + y) km upstream in 8 hours while the stream flows at double its usual speed, find the average of x and y.Solution
ATQ,
Let, speed of boat in still water and stream speed be B km/hour and s km/hour, respectively.
So, (B + s) = 36 … (i)
Also, (B – s) = 28 … (ii)
Solving equation (i), and (ii), we get,
B = 32 km/hour
s = 4 km/hour
According to question,
(x + y)/(B – 2s) = 8
(x + y) = 8 × (32 – 2 × 4) = 8 × 24 = 192 km
Therefore, average value of x and y = (x + y)/2 = 192/2 = 96 km
The Mahabodhi Temple was constructed entirely of ______ by Ashoka.Â
Regarding the Ayushman Bharat Digital Mission, consider the following statements:
I. It aims to provide universal health coverage by leveraging ...
Who among the following is the author of the book ‘Mrs Funny Bones’?
- Which cells in the retina are responsible for detecting color?
- The folk dances Dappu, Tappeta Gullu, Lambadi, and Dhimsa are associated with which Indian state?
Paris is the capital of which country?
When was the Namami Gange Scheme launched?
Which of the following cube in the answer figure can be made based on the unfolded cube in the question figure?
Who was one of the early leaders of the Prarthana Samaj movement?
Which country hosted the 3rd Summit for Democracy?
Relevant for Exams:
