Question
A train covers a certain distance at a speed of 12 km/h
and the next same distance with a speed of 21 km/h and the next same distance with a speed of 36 km/h. find the average speed?Solution
Since the distance is same in all the conditions. Therefore, Average speed = 3xyz/(xy + yz + zx) Average speed = 3 x 12 x 21 x 36/(12 x 21 + 21 x 36 + 12 x 36) Average speed = 3 x 12 x 21 x 36/(252 + 756 + 432) = 27216/1440 = 18.9 km/hr
In blood, platelets are required for
What is the term used for the process of removing calcium and magnesium from hardwater?
Match the Column I with Column II and select the correct answer using the codes given below:
Column I (Molecule) A. Proteins B. Carbohydrates C. ...
Which of the following is true regarding the periodic table?
Which of the following statements is not correct about the dual nature of matter?
What is the acceleration of an object if it starts from rest and reaches a speed of 20 m/s in 5 seconds?
The phenomenon of splitting white light into its component colours is called:
Food cans are coated with tin and not with zinc because
An object of mass 2 kg is lifted vertically through a distance of 1.5 m. The work done in process is
Relevant for Exams:
