Question
Pipes 'G' and 'H' can fill a tank in 15 and 20 minutes
respectively. A leak opens when the tank is half full, removing (2/7)th of the water supplied. What is the total time to fill the tank?Solution
Capacity = 60 litres (LCM of 15 and 20)
'G' = 60 ÷ 15 = 4 litres/min
'H' = 60 ÷ 20 = 3 litres/min
Time to fill half = 30 ÷ (4 + 3) = 30 ÷ 7 = 4.29 minutes
Effective rate = (5/7) × 7 = 5 litres/min
Time to fill remaining = 30 ÷ 5 = 6 minutes
Total time = 4.29 + 6 = 10.29 minutes
(44.11/4.01) + (11.99/3.03) + 23.9% of 49.978 = ?3.03
35.11% of 159.99 + √195.97 ÷ 7.02 = ?
? 2 + (39.99 × 10.99 + 7.01) - (39.99 × 2.99 2 + 21.99) = 21.99 × 23.01
150.04% of 800.08 + 20.04% of 749.89 = ? + 322.02
What approximate value will replace the question mark (?) in the following?
? –...
1560.182 ÷ √168 + √143 * √224 – 4649.87 ÷ 30.883= ?    Â
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.)...
15.232 + 19.98% of 649.99 = ? × 4.99
- 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.)
What is the area (in cm²) of a square inscribed in a circle with a radius of 10√2 cm?
