Question
A can complete a work in 12 days, and B can complete the
same work in 18 days. How many days will they take to complete the work if they work together?Solution
A’s rate of work = 1/12 B’s rate of work = 1/18 Together, their rate of work = 1/12 + 1/18 = (3 + 2) / 36 = 5/36 So, the time taken to complete the work together = 36/5 = 7.2 days Correct option: b
Quantity I. The perimeter of a triangle whose sides are 17 cm, 13 cm and 23 cm.
Quantity II. The perimeter of a square whose diagonal is 19 cm.
Solve (x² – 5x + 6) / (x – 1) ≤ 0.
Let 0 < x < 1, Then the correct inequality is
Quantity I. The perimeter of a triangle whose sides are 17 cm, 13 cm and 23 cm.
Quantity II. The perimeter of a square whose diagonal is 19 cm.
Quantity I. The volume of a cube whose surface area is 216 cm²
Quantity II. The volume of a cuboid whose sides are 8 cm, 9 cm and 13 cm.
What is the rate percent per annum?
Quantity I. Sum of money becomes four times in five years at simple interest.
Quantity II. The differe...
Quantity I. The volume of a cube whose surface area is 216 cm²
Quantity II. The volume of a cuboid whose sides are 8 cm, 9 cm and 13 cm.
...A merchant earned a profit of Rs. 75 on the selling price of a sweater that cost the merchant Rs. 450.
Quantity I. The profit expressed as a perc...
