Question
A student multiplied a number by 2/5 instead of 5/2 .
What is the percentage error in the calculation?Solution
Let the required number = (LCM of denominator 2 and 5) = 10 According to the question, Wrong answer = 2/5*10 = 4 Correct answer = 5/2*10 = 25 Required percentage of error = 25-4/25*100 = 84%
x men can finish a work in y days. 0.9x women can finish 1/3rd of the same work in (y - 8) days. If 0.8x women can complete 1/3rd work in 36 days. Find ...
Team A can built a project in 4 hours less than the time taken by Team B to built the same project.
The ratio of the strength of Team A to that o...
A, B and C can mow a field in 36 days, 72 days and 54 days respectively. All the three began the work together on January 1, 2016, but A left 8 days and...
‘F’ is 66.67% more efficient than ‘G’. ‘G’ worked alone for 10 days, and then ‘F’ completed the rest of the work. If the entire job was ...
- A woman is one-third as efficient as a man. How much time will 9 women take to complete a job that is 75% of the work done by 10 men in 12 days?
A boy(labour) was appointed by a manager on the term that he would be paid Rs 55 for each day of his work but would be fined at the rate of Rs 5 per day...
Anil alone can finish some work in 50 days. Anil and Aman completed the work together and earned Rs. 9,000 as wage. If Aman's wage share is Rs. 3,600, t...
Rahul can complete a work in 12 days and Ayush in 15 days. If they work together for 3 days, then the fraction of work that will be left is:
‘M’ and ‘N’ together can do a work in 20 days. If ‘M’ increases his efficiency by 25% while ‘N’ decreases his efficiency by 50%, then t...
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...
