Question
A contractor hired 80 workers to complete a work in 60
days. After 40 days, it was found that only half of the work was completed. Find the number of extra workers needed to be hired, so that the work gets completed on time.Solution
ATQ, Let 'n' more workers joined after 40 days and let total work be 2W units. Using (men X days) ÷ work = constant 
Simplifying, 
Therefore, 80 extra workers are needed so that work gets completed on time.
- If the mean proportion of 3.6 and 1.6 is 'k', then find the value of '5k'.
There are three numbers: A, B, and C. It is given that 45% of A, (3/5) of B, and 1.5 times C are all equal. What is the ratio of A, B, and C?
The ratio of two numbers P and Q is 6: 11 respectively. When 5 is added to P and 84 is subtracted from Q, then the ratio of P and Q becomes 5: 2 respect...
Rs 1080 was divided among Amit, Bhaskar and Charu in the ratio of 13:8:15 respectively. Find the amount received by Amit and Bhaskartogether.
A sum of money is divided among P, Q, R and S in the ratio of 8:9:13:14 respectively. If the share of R's is Rs. 1620 more than the share of Q, then wha...
Ratio of income of Prashant and Palak is 9:8. Income of Chhaya is 4/5 of income of Prashant and difference between income of Palak and Chhaya is ₹2400...
Two years ago the ratio of annual salary of three friends P, Q and R is 4 : 3 : 5. Every year since then the salary of P, Q and R increases by 10%, 12% ...
What is the mean proportion between 3 and 27?
The ratio of the two numbers is 7:13. 150% of the first number is equal to the 60% of the second number. Find the sum of both the numbers.
What is the fourth proportional to 2, 5, 12?
Relevant for Exams:
