Question
X and Y can complete a task together in 24 days, while Y
alone takes 48 days to finish it. X worked alone for some days and then Y completed the rest of the work in 36 days. What percentage of the total work was completed by X?Solution
ATQ,
Let total work = 48 units
Efficiency of (X + Y) = 48 / 24 = 2 units/day
Efficiency of Y = 48 / 48 = 1 unit/day
Work done by Y = 36 × 1 = 36 units
Work done by X = 48 – 36 = 12 units
Percentage of work done by X = (12 / 48) × 100 = 25%
Simplify the following expression and find the final value:
(18 ÷ 6 of 2 + 7 of 5) ÷ 5
(1520 - 1350) ÷ (550 – 500) = ?
Simplify the following expressions and choose the correct option.
[540 ÷ (6 × 3) + 7.5 × 4] ÷ 3 = ?
(64/25)? × (125/512)?-1 = 5/8
52% of 400 + √(?) = 60% of 600 - 25% of 400
What will come in the place of question mark (?) in the given expression?
(72 × 4 – 92) ÷ 14 = ?
32% of 450 + 60% of 150 = ? × 9
82.3 × 644.7 × 723.4 × 815.85 = 72?
961 × 4 ÷ 31 – 15% of 180 = ? – 73
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