Question
A and B working together, can do a piece of work in
4(1/2) hours. B and C working together can do it in 3 hours. C and A working together can do it in 2(1/4) hours. All of them begin the work at the same time. Find how much time they will take to finish the piece of work?Solution
AB = 9/2 BC = 3 CA = 9/4 Efficiency of AB : BC : CA = 2 : 3 : 4 LCM (Total units) = 36 Now, 2(A + B + C) = 2 (2 + 3 + 4) = 18 To finish the work they will take = 36/18 = 2 hours
27.27% of 5501.22 + 12.53% of 158.99 – √ 1599 = ?
98.999 x 99.001 + 640.856=?
[15.87% of 599.97 + 40.08 × ?] ÷ 4.04 = 8.082.02
If a:(b+c) =3:9 and c:(a+b) =10:14 then find the value of b:(a+c)?
119.98% of 80.02 - 15.12 × 2.02 + 19.95 = ?
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
A number is first increased by 35% and then decreased by 35%. If the net change in the number is 302.5, then find the original number.
What approximate value will replace the question mark (?) in the following?
18.99...
215.003X4.021 + 11.05 + 71.02 =?
A motor boat goes downstream from point A to B ,which is 36 km away from point A, and then returns to A. If actual speed of the boat in still water is 7...
Relevant for Exams:
