Question
Pipe A fills a tank in 30 hours. Pipes A and B together
fill it in 15 hours. Pipes B and C together fill it in 10 hours. Find the time taken by A, B and C together to fill the tank.Solution
ATQ, A = 1/30 A + B = 1/15 So, B = 1/15 − 1/30 B = (2 − 1)/30 = 1/30 B + C = 1/10 So, C = 1/10 − 1/30 C = (3 − 1)/30 = 2/30 = 1/15 A + B + C = 1/30 + 1/30 + 1/15 = (1 + 1 + 2)/30 = 4/30 = 2/15 Required time = 15/2 hours = 7.5 hours
18/2 of 3/9 of 2/6 of 69690= ?
Simplify the following expressions and choose the correct option.
{[(13)² − (7)²] ÷ 12} × 4 = ?
Simplify the following expressions and choose the correct option.
2500 ÷ (5²) + 60% of 240 = ?
11 × 25 + 12 × 15 + 14 × 20 + 15 = ?
3% of 3000 × ?% of 2000 = 3600
What will come in place of (?) question mark in the following expression.
(123 ÷ 62) × 15 - 120 = ?
- What will come in the place of question mark (?) in the given expression?
62.5% of 120 + ? = (720 + 90) ÷ √36 ((67)32 × (67)-18 / ? = (67)⁸
What will come in the place of question mark (?) in the given expression?
3.6 X 15 + 4.5 X 12 = 40% of (? - 50)Find the value of 16 X [(8 - 5) of 12 ÷ 4].
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