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Time taken by A and B together to complete the work = (30 × 45)/ (30 + 45) = 18 days Time taken by C alone to complete the work = 1.5 × 18 = 27 days
Curved surface area of cylinder is 1617 cm2. If ratio of radius to height of the cylinder is 25:21 respectively, then find the base area of t...
A cylindrical tank of radius 7 meters and height 10 meters is filled with water. Water is pumped out at the rate of 50 cubic meters per minute. How long...
A tank 60m long, 45m broad and 18m deep is dug in a ground 2000 m long and 45m wide. By how much will the level of the field rise if earth dug out of t...
The height of a right circular cone is 35 cm and the area of its curved surface is four times the area of its base. What is the volume of the cone (in ...
If the radius of a circle is given up to 15 times, how much of its perimeter will be the perimeter of the previous perimeter?
If the volume and radius of a cylinder is 4620 cm3 and 14 cm respectively then find the height of the cylinder?
A room 20 m long, 16 m broad and 8m high has 2 windows of 1 m and `1(1)/(2)` m and a door of 2m`xx` `1(1)/(2)` m. Find the cost of paper...
Some students (only boys and girls) from different schools appeared for an Olympiad exam. 20% of the boys and 15% of the girls failed the exam. The numb...
If the volumes of two cubes are in the ratio 343:64, then ratio of their edges is
A rectangular lawn 35m x 40m has two roads each 4metres wide, running in the middle of it, one parallel to the length and the other parallel to the brea...
