Question
‘A’ and ‘C’ together can dig a hole in 8 hours
while ‘A’, ‘B’ and ‘C’ together can dig the same hole in 6 hours. Find the time taken by ‘B’ alone to dig the same hole.Solution
Let the total work be 24 units {LCM (8 and 6)}
Efficiency of ‘A’ and ‘C’ together = 24/8 = 3 units/hour
Efficiency of ‘A’, ‘B’ and ‘C’ together = 24/6 = 4 units/hour
Efficiency of ‘B’ = 4 – 3 = 1 unit/hour
Time taken by ‘B’ to dig the same hole alone = (24/1) = 24 hours
From the information given below, calculate the sum insurable :
Date of fire-01.03.2016
Turnover from 01.03.2015 to 29.02.2016 - ₹ 88...
The country India shares longest international boundary with
Who among the following said, “The most perfect system of government is the one that produces the greatest possible happiness, the highest level of so...
A person spent 12.5% of his monthly income on food and 32% of the remaining on rent. If amount spent on rent is Rs 1512, then find the amount spent on f...
If in a population the natality is 50 and mortality is 80, in a span of 10 years. What is the growth rate (GR) of that population?
The general direct flow of summer monsoon in India is
Train ‘A’ can cross a pole in 8 seconds and a 70 metre long platform in 12 seconds. If the ratio of length of train ‘A’ and train ‘B’ is 2:5...
One article is sold at 11% profit while other is sold at 5% loss such that the difference between their selling prices is Rs. 176. If the cost price of ...
An intern was paid a stipend of Rs. 1,792 for a period of 30 days calculated on daily basis. During this period, he was absent for 4 days and was fined ...
Which one of the following is the average of all prime numbers between 21 and 55 ?
Relevant for Exams:
