CBSE Class 10 - English (Communicative) - SA2- Marking Scheme of Sample Question Paper (2016-17) (#cbseExamPapers)

CBSE Class 10 - SA2 - English (Communicative)- Marking Scheme of Sample Question Paper (2016-17) 

☛See English (Communicative) Sample Question Paper 2016-17

CBSE Class 8/9/10/11/12: ⑬ Fun Facts about English Words (#englishgrammar) (#cbsenotes)

⑬ Fun Facts about English Words

① The following sentence contains all the alphabets of English (A to Z).

The quick brown fox jumps over the lazy dog 

Such type of sentences are called pangrams. Other examples of pangrams are:

The five boxing wizards jump quickly.

Pack my box with five dozen liquor jugs.

② Pneumonoultramicroscopicsilicovolcanoconioisis (a lung disease) is the longest word in the English language that appears in major dictionaries. Mostly, other longest words are also technical or biological terms.

CBSE Class 9 Maths - Surface Areas and Volumes - NCERT Exercise 13.5 (#cbsenotes) (#ncertsolutions)

Surface Areas and Volumes 

NCERT Exercise 13.5

Q1: A matchbox measures 4 cm × 2.5 cm × 1.5 cm. What will be the volume of a packet containing 12 such boxes?

Answer: Given, l = 4 cm, b = 2.5 cm, h = 1.5 cm
Volume of 1 matchbox = lbh
= 4 × 2.5 × 1.5 cm3 = 15 cm³
Volume of 12 matchboxes = 15 × 12  = 180 cm³ (Answer)


Q2: A cuboidal water tank is 6 m long, 5 m wide and 4.5 m deep. How many litres of water can it hold? (1 m³ = 1000 l)

Answer: Given,  l = 6 m, b = 5 m, h = 4.5 m
Volume of the tank = lbh
= 6 × 5 × 4.5 = 135 m³
= 135 × 1000 litres = 1,35,000 litres (Answer)

CBSE Class 10 - English (Communicative)- Sample Question Paper (2016-17)

CBSE Class 10 - SA2 - English (Communicative)- Sample Question Paper (2016-17) 

☛See Marking Scheme of Class 10  English (Comm.) SQP 2016-17

CBSE Class 9 - Maths - Surface Areas and Volumes (NCERT Ex 13.4) (#cbseclass9notes)

Surface Areas and Volumes - Spheres

(NCERT Ex 13.4)

Q1: Find the surface area of a sphere of radius 
(i) 10.5 cm
(ii) 5.6 cm
(iii) 14 cm

Answer:
(i) r = 10.5 cm
Surface area of the sphere = 4πr²
= 4 × (22/7) × (10.5)²
  = 1386 cm² (Answer)

(ii) r = 5.6 cm
Surface area of the sphere = 4πr²
= 4 × (22/7) × (5.6)²
= 394.24 cm² (Answer)

(iii) r = 14 cm
Surface area of the sphere = 4πr²
= 4 × (22/7) × 14 × 14
= 2464 cm² (Answer)


Q2: Find the surface area of sphere of a diameter :
(i) 14 cm
(ii) 21 cm
(iii) 3.5 m

CBSE Class 12 - English (Elective)- Marking Scheme of Sample Question Paper (2016-17)

CBSE Class 12 - English (Elective)- Marking Scheme of Sample Question Paper (2016-17) 


☛See English (Elective) Sample Question Paper (2016-17)

CBSE Class 9 - Maths - Surface Areas and Volumes - NCERT Ex 13.3 (#cbsenotes)

Surface Areas and Volumes

EXERCISE 13.3

Q1: Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area.

Answer: Given r = 10.5/2 = 5.25 cm, l = 10 cm.

Curved surface area (CSA) of the cone = πrl
= (22/7) × 5.25 × 10  = 165 cm² (Answer)



Q2: Find the total surface area of a cone, if its slant height is 21 m and diameter of its base is 24 m.

Answer: Given, l = 21m, r = 24/2 = 12 m
TSA (cone) = πr(l + r)
= (22/7) × 12 (21 + 12)
= 1244.57 m² (Answer)