1. If the sides of an equilateral triangle are increased by 20%, 30% and 50% respectively to form a new triangle, the increase in the perimeter of the equilateral triangle is
(1) 25%
(2) 33 1/3%
(3) 75%
(4) 100%
2. If the radius of a sphere is doubled, its volume becomes
(1) double
(2) four times
(3) six times
(4) eight times
3. If each side of a rectangle is increased by 50%. Its area will be increased by
(1) 50%
(2) 125%
(3) 100%
(4) 250%
4. The area of three adjacent faces of a cuboid are x, y, z square units respectively. If the volume of the cuboid be y cubic units, then the correct relation between v, x, y, z is
(1) v^2 = xyz
(2) v^3 = xyz
(3) v^2 = x^3 y^3 z^3
(4) v^3 = x^2 y^2 z^2
5. A right circular cylinder is formed by rolling a rectangular paper 12 cm long and 3 cm wide along its length. The radius of the base of the cylinder will be
(1) 3/2π cm
(2) 6/2π cm
(3) 9/2π cm
(4) 2π cm
6. The area of a triangular field, the lengths of whose sides are 50 m, 78 m and 112 m, is
(1) 1600 m^2
(2) 1480 m^2
(3) 1680 m^2
(4) 3360〖 m〗^2
7. A cone of height 7 cm and base-radius 1 cm is carved out from a cuboidal block of wood of size 10 cm×5 cm×2 cm. In the process, the wood wasted will be (use π=22/7)
(1) 92 2/3%
(2) 46 1/3%
(3) 53 2/3%
(4) 7 1/3%
8. A rectangular tank of length 10 m, breadth 5 m and depth 6 m is full of water. How much water must be taken out of the tank to reduce the level of water in the tank by one metre?
(1) 30 m^3
(2) 60 m^3
(3) 50 m^3
(4) 100 m^3
9. Some oil is filled in a right circular cylindrical vessel. The radius of the base of the vessel is 6 cm. Some iron balls, each of diameter 3 cm, are completely dipped into the oil. If the level of oil in the vessel rises by 2 cm, the number of iron balls dipped into the oil is
(1) 16
(2) 8
(3) 32
(4) 4
10. The length, breadth and height of a cuboid are in the ratio 1 : 2 : 3. If they are increased by 100%, 200% and 200% respectively, then, compared to the original volume the increase in the volume of the cuboid will be
(1) 5 times
(2) 18 times
(3) 12 times
(4) 17 times
Note : Answers will be updated soon....
No comments:
Post a Comment