On decreasing the radius of a sphere by 20%, by what per cent its volume will be decreased?
20
28.8
57.6
48.8
Three solid spheres of radii 3 cm, 4 cm and 5 cm respectively are melted and made a large solid sphere. Radius of this sphere
12
10
6
4
Class VI students were given the following layout of a house
The students were asked to find out the
A. perimeter and area of each room
B. total perimeter and total area of the
house.
The above activity can be used by teacher as
formative assessment task because
the students will find the task interesting and
will not disturb each other
it will remove the phobia of Maths examination
it will be easy for teacher to engage all the students for 40 min period
the students' responses will help teacher to diagnose their understanding regarding finding dimensions, calculations, knowledge of formulae for perimeter and area etc.
Student's ability to apply the concept of square roots in real life situation can be assessed through the following problem.
Find the smallest number that may be subtracted from 5607 to get a perfect square
2025 plants are to be planted in a garden in such a way that each row contains as many plants as the number of rows. Find the number of rows and number of plants in each row
Find the smallest square number that is divisible by each of the numbers 4, 9 and 10
Calculate the square root of 25600
42 cubes each of side 1 cm are glued together to form a solid cuboid. If the perimeter of the base of the cuboid is 18 cm, then its height (in cm)
3
4
1
2
triangles will be congruent if B is a right anglE
triangles are congruent only if AB= AC
triangles cannot be congruent
triangles must be congruent
The area of a trapezium-shaped field is 720 m, the distance between the two parallel sides is 20 m and the length of one of the parallel sides is 35 m. The length of the other parallel side is
37m
40m
35m
36m