Area

Practice Area – Two circles touch each other externally. The distance between their centres is 14 cm and the sum of their areas is 130 cm^2. Find their radii.

Practice Area – A store owner is packing small radios into larger boxes that measure 25 in. by 42 in. by 60 in. If the measurement of each radio is 7 in. by 6 in. by 5 in., then how many radios can be placed in the box?

Practice Area – A thermal chimney of circular cross section has outer and inner radii of 3m and 2m respectively. Find the cost of cement finishing for the inner and outer surface at Rs20 per sq.meter, if the height of the chimney is 56m.

Practice Area – In a square , all the mid points are joined. the inner square is shaded. If the area of the square is A, what is the shaded area?

Practice Area – If the depth of a tree is 3 levels, then what is the size of the Tree?

Practice Area – A sphere is cut into 4 identical pieces after it was painted. What is the ratio of the painted area to the unpainted area?

Practice Area – How big will an angle of one and a half degree look through a glass that magnifies things three times?

Practice Area – The area of a square field is 24200 sq m. How long will a lady take to cross the field diagonally at the rate of 6.6 km/hr?

Practice Area – Four horses are tethered at 4 corners of a square field of side 70 metres so that they just cannot reach one another. The area left ungrazed by the horses is:

Practice Area – How many squares can be formed using the checkered 1 * 1 squares in a normal chessboard?

Practice Area – Find the number of the bricks, each measuring 25 cm by 12.5 cm by 7.5 cm, required to build a wall 6 m long, 5 m high and 50cm thick, while the mortar occupies 5% of the volume of the wall.

Practice Area – Mr. loyd wants to fence his Square shaped land of 120Sqft each side.If a pole is laid every 12ft how many poles do he need?

Practice Area – The length of a rectangle is increased by 60%. By what percent would the width have to be decreased to maintain the same area ?

Practice Area – If A and B run on a circular path in opposite directions of constant speeds with different velocities from P and Q. First time they meet 800 mts away from P and second time they meet 700 mts away from P, what is the lenght of the circular path.

Practice Area – The sides of a triangle are in the ratio 3:5:7. If the pereimeter is 60 cms,the longest side is?