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Let the work ‘M’ = 6 units (LCM of 6 and 3) Efficiency of P = 6/6 = 1 units Efficiency of Q = 6/3 = 2 units Efficiency of P, Q and R = (6 × 12)/6 = 12 units per day Efficiency of R = 12 – (1 + 2) = 9 units per day Time taken by R to finish work ‘N’ = 72/9 = 8 days
In a class of 50 students and 20 teachers, each student got gifts that were 24% of total number of students and each teacher got gifts that were 16% of ...
Sides of a parallelogram are in the ratio 5:4. Its area is 1200 sq. units. Altitude on the greater side is 24 units. Altitude on the smaller side is:
The ratio of length and breadth of a rectangular field is 5:9. If the total cost of surrounding it at the rate of Rs 7.50 per meter is Rs 4200, then fin...
A solid cylinder has total surface area of 1848 sq.cm. Curved surface area is 1/3rd of its total surface area. The volume of the cylinder is:
The curved surface area of a hemisphere is 72π cm2, then its radius is:
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The average weight of a group of five persons, A, B, C, D, and E is 78 kg. If another person K joins the group then the average weight of the group is d...
The ratio of the breadth to the length of a rectangular field is 3:4. The total cost of cutting the grass of the field at the rate of Rs 12 per m2<...
In what ratio coffee at 255 Rs/kg should be mixed with the coffee at 310 Rs/kg so that after mixture its rate become 270 Rs/kg if the quantity of 1st ty...
The length of a rectangle is twice its breadth. If its length is decreased by 6 cm and breadth is increased by 6 cm, the area of the rectangle is increa...
