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Total weight of all boys = 15 X 48 = 720 kg So, total weight of all girls = 720 X 0.75 = 540 kg So, average weight of a girl = 540 ÷ 12 = 45 kg Required ratio = 48:45 = 16:15 Hence, option b.
Bala travels first one-third of the total distance at the speed of 10 km/h and the next one-third distance at the speed of 20 km/h and the last one – ...
A solid right circular cylinder is melted and shaped into a right cone with a base of equal radius. By what percent is the length of the solid increased?
If the length of a rectangle is increased by 40% and its breadth is decreased by 25%, then the area of the rectangle will be increased or decreased by h...
PQRS is a rectangle. T is a point on PQ such that RTQ is an isosceles triangle and PT = 5 QT. If the area of triangle RTQ is 12 √3 sq.cm, then the ar...
A bus covers some distance at a certain speed. If a person covers one-third of that distance in triple time, then the ratio of the speed of the person t...
The ratio of the height of a room and its semi-perimeter is 2:5. The cost of applying 50cm wide paper at the rate of Rs 8/meter on the remaining walls e...
Consider a parallelogram where the ratio between the height and the base is 14:9. Given that the area of this parallelogram is 1134 square centimeters, ...
If the length of the diagonal of a square is 13.6 cm, then the area of the square is:
A field is 125m long and 15m wide. A tank 10m ×7.5m×6m was dug in it and the earth thus dug out was spread equally on the remaining field. The level o...
