Question
Bala travels first one-third of the total distance at
the speed of 10 km/h and the next one-third distance at the speed of 20 km/h and the last one – third distance at the speed of 60 km/h. What is the average speed of Bala?Solution
ATQ, we can say that Let the total distance be 180 km. 1/3rd of total distance = 180 × (1/3) = 60 km Time taken by Bala to cover first one-third of the total distance = 60/10 = 6 hrs Time taken by Bala to cover next one-third of the total distance = 60/20 = 3 hrs Time taken by Bala to cover last one-third of the total distance = 60/60 = 1 hr Average speed = Total time/total distance = 180/ (6 + 3 + 1) = 180/10 = 18 km/hr.
Which one of the following chemical is used as food preservative?
In the year 1911, who among the following formed the Social Service League in Bombay?
Which one of the following concerns prepares Receipts and Payments Account?
Which of the following substances is a bad conductor of electricity?
When did India join the Global Partnership on AI?
In India, Mangrove forests are majorly found in which of the following states?
When an object is kept at a distance 20 cm in front of a concave mirror, a real image is formed at the centre of curvature of the mirror. Magnification ...
Which state of India is having the lowest forest cover?
In the questions given below, there are three statements followed by three conclusions I, II and III. You have to take the three given statements to be...
Which of the following IITs is in a partnership with NASA-Caltech and the University of Gothenburg, Sweden, to design a low cost camera setup?
Relevant for Exams:
