Wei required $2280 after 11 weeks to buy a watch. He saved $110 in the first week and increased his weekly savings by $10 every week. Find whether he will be able to buy a watch after 11 weeks.
A vertical stick which is 33cm long casts a 30cm long shadow on the ground. At the same time, a vertical tower casts a 50m long shadow on the ground. Find the height of the tower.
Tony drew the following figure in his mathematics notebook. In which AB and BC are co-initial tangents drawn from an external point A to the circle OB and OC are the radii of the circle. Then what is always true ?
To warn ships for underwater rocks, a lighthouse throws a red colored light over a sector of angle 90∘ to a distance of 4.9km. Find the area of the sea over which the ships are warned. ( Use π=227)
A drinking glass is in the shape of a frustum of a cone of height 20cm. The diameters of its two circular ends are 13cm and 10cm. Find the capacity of the drinking glass.(Use π=227)
In this diagram, the triangle represents women, the square represents accountants and the circle represents employed. Find the number of women who are accountants and employed.