Question
Karan is five times as efficient as Varun and twice as
efficient as Arjun. If Varun takes 30 days to finish some work, then find the time taken by Karan and Arjun to do the same work together.Solution
Since, Karan is five times as efficient as Varun, he will take one-fifth the time taken by Varun to finish the work. So, time taken by Karan to do the work = 30 ÷ 5 = 6 days And, Karan is twice as efficient as Arjun, so Arjun will take double the time taken by Karan. So, time taken by Arjun to do the work = 2 × 6 = 12 days Let the total work be '12x' units. So, efficiency of Karan = 12x ÷ 6 = '2x' units/day And, efficiency of Arjun = 12x ÷ 12 = 'x' units/day So, required time = 12x ÷ (2x + x) = 4 days Hence, option c.
How many States in India are Landlocked?Â
The Brahmaputra, Irrawady and Mekong rivers originate in Tibet and flow through narrow and parallel mountain ranges in their upper reaches. Of these riv...
Which of the following states is NOT part of the Peninsular Plateau in India?
With reference to the latitudinal and longitudinal extent of India, consider the following statements:
1. Ten States in India does not share any ...
A particular State in India has the following characteristics:Â
1. It is located on the same latitude which passes through northern Rajasthan.
Which is the largest city in the world by population ?
The Malacca Strait connects which of the following?
Which Country shares the longest boundary with India?
Match the following stadiums with the sports they are primarily associated with:
Consider the following statements regarding the Great Indian Desert:
1. The prevailing southwest monsoon winds tend to bypass the Thar to the eas...
Relevant for Exams:
