Question
Two pipes A and B fill a square tank in 28 and 36 hours
respectively while a third pipe C can empty it in 63 hours If all three pipes are opened together then what time will they take to fill the tank?Solution
Alternate Method: Let leak = C A B A+B+C Time 28 36 63 Let capacity of total tank = LCM (28,36 & 63) = 7*9*4 L Eff 9 : 7 : 4 So Leak can empty in 1 hr = A+B+C - (A+B) = 4 - (9+7) = 4 - 16 = -12 L Hence leak can empty the tank in = 7*9*4/12 = 21 hours
- 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.)
`(601/49)xx(399/81)` ÷ `(29/201)` = ?
What approximate value will replace the question mark (?) in the following?
29.99...
A Sales Executive gets a commission on total sales at 10%. If the sale is exceeded Rs.15,000 he gets an additional commission as a bonus of 5% on the ex...
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.)...
- 349.99% of 11.98 = ?– 12.5% of 143.99
1120.04 – 450.18 + 319.98 ÷ 8.06 = ?
(20.23% of 780.31) + ? + (29.87% of 89.87) = 283
45.45 × 11.67 + 14399.88 ÷ 8.01 + 124.79 = ?
95.001% of 8219.99 - 4/9 % of 5399.98 + 109.99 = ?Â
Relevant for Exams:
