Question
A person covers 1/4 of his journey at the speed of 25
km/h,1/2 of the journey at 40km/h and the remaining at the speed of 50 km/h. Find his average speed per hour for the whole journey (in km/h).Solution
Let the total distance be 4 units (LCM of 4 and 2) A person covers a distance with a speed of 25 km/hr. = 1/4 x 4 = 1 unit A person covers a distance with a speed of 40 km/hr. = 1/2 x 4 = 2 unit Remaining Distance = 4-1- 2 = 1 unit Average Speed = 4/ (1/25 +2/40+1/50) =4/ (8+10+4)/200 =800/22 =36(8/22) =36(4/11) km/h
Who was known as the ‘Frontier Gandhi/Sarhadi Gandhi’ due to his ideologies?
Odisha has recently announced a landmark three-year sponsorship deal for the Indian National Kho Kho team. What is the total amount committed by the sta...
Who is the first Indian to participate in a Super Heavyweight Boxing event in the 2020 Olympic Games?
Sweet Revolution is related with _________.
Veteran journalist and TV anchor Karan Thapar is the author of which of the following books?
Which is the longest river in the world?
What was Professor Arvind Panagariya's former job before becoming Chairman of the 16th Finance Commission of India?
Plants that do not have well-differentiated body design fall in this group. The plants in this group are commonly called algae. These plants are predomi...
Which structure layer in some cell types is composed mainly of carbohydrates such as cellulose, hemicellulose and lignin in the ratio of 4 : 3 : 3 and s...
Match List-1 with List-2 and select the correct answer by using the code given below the list.
Relevant for Exams:
