NCERT Solutions with NCERTplanet
NCERT Solutions with NCERTplanet
Class 9 – Mathematics Surface Areas and Volumes – Exercise 13.7 Exercise 13.7 Question :1 : Find the volume of the right circular cone with (i) radius 6 cm, height 7 cm (ii) radius 3.5 cm, height 12 cm. Answer…
Class 9 – Mathematics Surface Areas and Volumes – Exercise 13.6 Exercise 13.6 Question :1 : The circumference of the base of a cylindrical vessel is 132 cm and its height is 25 cm. How many litres of water can…
Class 9 – Mathematics Surface Areas and Volumes – Exercise 13.5 Exercise 13.5 Question :1 : A matchbox measures 4 cm * 2.5 cm * 1.5 cm. What will be the volume of a packet containing 12 such boxes? Answer…
Class 9 – Mathematics Surface Areas and Volumes – Exercise 13.4 Exercise 13.4 Question : 1 : Find the surface area of a sphere of radius: (i) 10.5 cm (ii) 5.6 cm (iii) 14 cm Answer : (i) r =…
Class 9 – Mathematics Surface Areas and Volumes – Exercise 13.3 Exercise 13.3 Question :1 : Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. find its curved surface area. Answer :…
Class 9 – Mathematics Surface Areas and Volumes – Exercise 13.2 Exercise 13.2 Question :1 : The curved surface area of a right circular cylinder of height 14 cm is 88 cm2. Find the diameter of the base of the…
Class 9 – Mathematics Surface Areas and Volumes – Exercise 13.1 Exercise 13.1 Question : 1 : A plastic box 1.5 m long, 1.25 m wide and 65 cm deep is to be made. It is to be open at…
Class 9 – Mathematics Herons Formula – Exercise 12.2 Exercise 12.2 Question : 1: A park, in the shape of a quadrilateral ABCD, has ∠C = 90°, AB = 9 m, BC = 12 m, CD = 5 m and…
Class 9 – Mathematics Herons Formula – Exercise 12.1 Exercise 12.1 Question : 1 : A traffic signal board, indicating ‘SCHOOL AHEAD’, is an equilateral triangle with side ‘a’. Find the area of the signal board, using Heron’s formula. If…
Class 9 – Mathematics Constructions – Exercise 11.2 Exercise 11.2 Question : 1 : Construct a triangle ABC in which BC = 7 cm, ∠B = 750 and AB + AC = 13 cm. Answer : The below given steps…
Class 9 – Mathematics Constructions – Exercise 11.1 Question : 1 : Construct an angle of 900 at the initial point of a given ray and justify the construction. Answer : Steps of Construction: (i) Let us take…
Class 9 – Mathematics Circles – Exercise 10.6 Exercise 10.6 Question : Prove that the line of centres of two intersecting circles subtends equal angles at the two points of intersection. Answer : Given : Two intersecting circles, in which…
Class 9 – Mathematics Circles – Exercise 10.5 Exercise 10.5 Question :1 : In Fig. 10.36, A,B and C are three points on a circle with centre O such that ∠ BOC = 300 and ∠ AOB = 60°. If D is…
Class 9 – Mathematics Circles – Exercise 10.4 Exercise 10.4 Question : 1 : Two circles of radii 5 cm and 3 cm intersect at two points and the distance between their centres is 4 cm. Find the length of…
Class 9 – Mathematics Circles – Exercise 10.3 Exercise 10.3 Question : 1 : Draw different pairs of circles. How many points does each pair have in common? What is the maximum number of common points? Answer : No common…
Class 9 – Mathematics Circles – Exercise 10.2 Exercise 10.2 Question :1 : Recall that two circles are congruent if they have the same radii. Prove that equal chords of congruent circles subtend equal angles at their centres. Answer :…
Class 9 – Mathematics Circles – Exercise 10.1 Exercise 10.1 Question : Fill in the blanks: (i) The centre of a circle lies in_______ of the circle. (exterior/ interior) (ii) A point, whose distance from the centre of a circle…
Class 9 – Mathematics Areas of Parallelograms and Triangles – Exercise 9.4 Exercise 9.4 Question : Parallelogram ABCD and rectangle ABEF are on the same base AB and have equal areas. Show that the perimeter of the parallelogram is greater…
Class 9 – Mathematics – Exercise Exercise 9.3 Question : 1 : In the given figure, E is any point on median AD of a ∆ABC. Show that: ar (ABE) = ar (ACE) Answer : AD is the median of…
Class 9 – Mathematics Areas of Parallelograms and Triangles – Exercise 9.2 Exercise 9.2 Question : 1 : In the figure, ABCD is a parallelogram, AE ⊥ DC and CF ⊥ AD. If AB = 16 cm, AE = 8…