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Maths, VIII

     Choose  the correct alternative :

  1. The parallel sides of a trapezium are 28 cm and 16 cm and its are is 220 cm2. The distance between its parallel sides is

a) 5 cm                                  b) 10 cm                                   c)    15 cm                                d)   20 cm

 

  1.  If an edge of a cube is doubled, then its surface area will become

a) twice                                 b) thrice                 c) 1/4 times                d)   four times

  1.  The volume of a cube of edge 01 m3 (in cm3) is

a) 0.000001                           b) 1                        c)    0001                               d)   0.001

  1.  The radius of a right circular cylinder is doubled keeping its height   same. The ratio between the volumes of new cylinder and the original cylinder is

a)  3 : 1           b) 4 : 1        c)   2 : 1      d)  8 : 1

  1. A rectangular sheet of paper 44cm × 20cm is rolled along its length and a cylinder is formed. Find the volume of the cylinde
  1. The diameter of a roller is 80 cm and its length is 126 cm. It takes 750 complete revolutions moving once over to level a playground. Find the area of the playground.
  1. A cuboidal tin open at the top has dimensions 20 cm    16 cm   14 cm. What is the total area of a sheet of metal required to make 10 such tin
  1. A piece of wire is the form of a rectangle whose length is 52cm and breadth is 36cm. It is cut at a point and bent in the form of a circle. Find the radius of the circle.
  1. Find the area of trapezoid whose parallel sides are of lengths 10 cm and 12 cm and the distance between them is 4 cm.
  1. The circumference of the base of a right circular cylinder is 176 cm and it is 1 m high. Find the lateral surface area of the cylinde
  1. A pole of 8 m height casts a 10m long shadow. Find the height of the tree that casts a 40 m long shadow under similar conditions
  1. If a pipe can fill a tank of capacity 50 l in 5 hours. Then how long will it take to fill a tank of capacity 75l
  1. If the cost of 20m of a cloth is ` 1600, then what will be the cost of 24.5 m of that cloth.
  1. A loaded truck travels 14 km in 25 minutes. If the speed remains the same, how far can it travel in 5 hours?
  1. A car takes 4 hours to reach the destination by travelling at a speed of 60 km/h. How long will it take if the car travels at a speed of 80 km/h?

Date of submission: 4 January 2016


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