Question
Working in a shift of 5 hours 39 workers take 12 days to
build a stretch of highway. In how many days will 30 workers working 6 hours a day, complete the work?Solution
=> M1 × H1 × D1 = M2 × H2 × D2
=> 39 × 12 × 5 = 30 × 6 × D2
=> D2 = 13 days
A sum of money is divided among P, Q, R and S in the ratio of 1:2:6:7 respectively. If the share of R's is Rs. 2860 more than the share of Q, then what ...
The ratio of the number of girls to the number of boys in a school of 720 students is 3 : 5. If 18 boys left the school, find how many new girls ...
Find the third proportion of √ 2, √ 7 and √ 21.
The ratio of the salaries of Amit, Raj, and Dev is 5:6:7 respectively. Sumit’s salary is 10 rupees less than Amit’s. If the difference between Dev ...
There is a mixture of 63 liters of apple juice and water in a vessel. The ratio of apple juice to water is 3:4. If 14 liters of the mixture is taken out...
If the third proportion of 45 and 60 is “0.5k”, then find the value of (k − 20) : (k + 40).
P, Q and R together started a business. Three times the investment of P equals five times the investment of Q and the capital of Q is twice that of R. F...
What is the fourth proportional to 10¹⁵, 2⁶ and 5⁶?
Two numbers are in the ratio of 6:13. If three is added to both numbers, the ratio becomes 1:2. Find the smaller number.
- If A: B = 4: 5 and B: C = 3: 7, then what is the value of (3A + 8C)/(6B - 2C)?