Question
Two inlet pipes M and N alone can fill a tank in 10
hours and 12 hours respectively and an outlet pipe P alone can empty the whole tank in 8 hours. First pipe M is opened for 5 hours, then pipe P is opened for 2 hours and rest of the tank is filled by pipe N. In what time will the tank be filled completely?Solution
Total capacity = 120 units (LCM of 10, 12 and 8) Efficiency of pipe M = 120/10 = 12 units/hr Efficiency of pipe N = 120/12 = 10 units/hr Efficiency of pipe P = 120/-8 = -15 units/hr Capacity of tank filled by pipe M in 5 hours = 12 × 5 = 60 units Capacity of tank emptied by pipe P in 2 hours = -15 × 2 = -30 units Capacity of tank left for pipe N = 120 – 60 – (-30) = 90 units Time taken by pipe N to fill the remaining tank = 90/10 = 9 hrs Total time taken = 5 + 2 + 9 = 16 hrs
What will come in the place of question mark (?) in the given expression?
133 ÷ 19 X √576 + ? ÷ 2 = 32 X 7.5What will come in the place of question mark (?) in the given expression?
(96 - 59) X 6 + ?2 = 136.5 X 4
- What will come in the place of question mark (?) in the given expression?
40% of (320 ÷ 4) + 2² X 25 = ? + 42 1550 ÷ 62 + 54.6 x 36 = (? x 10) + (28.5 x 40)     Â
(1748 ÷ 8) + 76.8 × 35 =(? × 4) + (42 × 35.5)
- What will come in place of the question mark (?) in the following questions?
0.5×120+25=? √14400 x √8100 - (60)² = ? + (80)²
What will come in place of the question mark (?) in the following expression?
?% of 600 + 15 × 28 = 30% of 1800
- What will come in place of (?), in the given expression.
(4² + 6²) × 2 = ? 300% of (3341 – 471) = ? × (√4225/195)
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