8th Standard Syllabus & Materials
8th Standard
Tamilnadu 8th Standard роХрогро┐родроорпН роЗропро▒рпНроХрогро┐родроорпН Important Questions And Answers Study Material - QB365
NEW8th Standard
Tamilnadu 8th Standard роХрогро┐родроорпН роОрогрпНроХро│рпН Important Questions And Answers Study Material - QB365 Set B
NEW8th Standard
Tamilnadu 8th Standard роХрогро┐родроорпН роОрогрпНроХро│рпН Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
Tamilnadu 8th Standard Social Science рокрпКро░рпБро│ро┐ропро▓рпН - рокрпКродрпБ рооро▒рпНро▒рпБроорпН родройро┐ропро╛ро░рпН родрпБро▒рпИроХро│рпН Important Questions And Answers Study Material - QB365
NEW8th Standard
Tamilnadu 8th Standard Social Science роХрпБроЯро┐роорпИропро┐ропро▓рпН - роирпАродро┐родрпНродрпБро▒рпИ Important Questions And Answers Study Material - QB365
NEW8th Standard
Tamilnadu 8th Standard Social Science роХрпБроЯро┐роорпИропро┐ропро▓рпН - рокро╛родрпБроХро╛рокрпНрокрпБ рооро▒рпНро▒рпБроорпН ро╡рпЖро│ро┐ропрпБро▒ро╡рпБроХрпН роХрпКро│рпНроХрпИ Important Questions And Answers Study Material - QB365

Published on: 13/05/2022
QB365 provides detailed and simple solution for every book back questions in class 8 Maths subject.It will helps to get more idea about question pattern in every book back questions with solution.
latest Book back QuestionsDownload Tamil Nadu 8th Standard Maths question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Maths Test1.
X alone can do a piece of work in 6 days and Y alone in 8 days. X and Y undertook the work for Rs 4800. With the help of Z, they completed the work in 3 days. How much is Z’s share?
2.
A, B and C can complete a work in 5 days. If A and C can complete the same work in \(7\cfrac { 1 }{ 2 } \) days and A alone in 15 days, then in how many days can B and C fi nish the work?
3.
Amutha can weave a saree in 18 days. Anjali is twice as good a weaver as Amutha. If both of them weave together, in how many days can they complete weaving the saree?
4.
If 32 men working 12 hours a day can do a work in 15 days, how many men working 10 hours a day can do double that work in 24 days?
5.
Carpenter A takes 15 minutes to fit the parts of a chair while Carpenter B takes 3 minutes more than A to do the same work. Working together, how long will it take for them to fit the parts for 22 chairs?
1.
X's 1 day work = \(\cfrac { 1 }{ 6 } \)
Y''s 1 day work = \(\cfrac { 1 }{ 8 } \)
(X + Y + Z)'s, 1day work = \(\cfrac { 1 }{ 3 } \)
Z's 1 day work = \(\cfrac { 1 }{ 3 } -\left( \cfrac { 1 }{ 6 } +\cfrac { 1 }{ 8 } \right) =\cfrac { 16-(8+6) }{ 48 } =\cfrac { 16-14 }{ 48 } =\cfrac { 2 }{ 48 } =\cfrac { 1 }{ 24 } \)
Since they all work for the same number of days the ratio in which they share the money is equal to the ratio of their work done per day.
\(\cfrac { 1 }{ 6 } :\cfrac { 1 }{ 8 } :\cfrac { 1 }{ 24 } =\cfrac { 8 }{ 48 } :\cfrac { 6 }{ 48 } :\cfrac { 2 }{ 48 } =8:6:2\)
Total part = 4 + 3 + 1
= 8
\(\therefore \text { Z's share }=\frac{1}{8} \times 48000\)
= Rs. 6000
2.
(A + B + C)'s 1 day work = \(\cfrac { 1 }{ 5 } \)
A's 1 day work = \(\cfrac { 1 }{ 15 } \)
B and C's 1 day work = \(\cfrac { 1 }{ 5 } -\cfrac { 1 }{ 15 } =\cfrac { 3-1 }{ 15 } =\cfrac { 2 }{ 15 } \)
Band c finish the work in \(\cfrac { 15 }{ 2 } =7\quad 1/2\quad days\)
3.
Amutha's 1 day work = \(\cfrac { 1 }{ 18 } \)
If both of them weave together they complete weaving the Saree in 6 days.
4.
\(Given=32, \mathrm{H}_{1}=12, \mathrm{D}_{1}=15, \mathrm{~W}_{1}=1, \)
\(\mathrm{D}_{2}=24, \mathrm{H}_{2}=10, \mathrm{~W}_{2}=2 \)
\(\frac{P_{1} \times H_{1} \times D_{1}}{W_{1}} =\frac{P_{2} \times H_{2} \times D_{2}}{W_{2}} \)
\(\frac{32 \times 12 \times 15}{1} =\frac{P_{2} \times 10 \times 24}{2} \)
\(\mathrm{P}_{2} =\frac{32 \times 12 \times 15 \times 2}{10 \times 24}=48 \)
48 men working 10 hours a day can do double that work in 24 days
5.
Carpenter A fits the parts of a chair in 1 minute = \(\cfrac { 1 }{ 15 } \)
Carpenter B fits the parts of a chaaiir In 1 minute = \(\cfrac { 1 }{ 18 } \)
(A+B) fit the parts in 1 minute = \(\cfrac { 1 }{ 15 } +\cfrac { 1 }{ 18 } =\cfrac { 6+5 }{ 90 } =\cfrac { 11 }{ 90 } \)
Time taken to fit. 1 chair = \(\cfrac { 90 }{ 11 } \) mtrs
Time taken to fit the parts for 22 chairs = 3 hours
8th Standard Syllabus & Materials
8th Standard
Tamilnadu 8th Standard Social Science рокрпБро╡ро┐ропро┐ропро▓рпН - рокрпБро╡ро┐рокрпНрокроЯроЩрпНроХро│рпИроХрпН роХро▒рпНро▒ро▒ро┐родро▓рпН Important Questions And Answers Study Material - QB365
NEW8th Standard
Tamilnadu 8th Standard Social Science рокрпБро╡ро┐ропро┐ропро▓рпН - роХрогрпНроЯроЩрпНроХро│рпИ роЖро░ро╛ропрпНродро▓рпН (роЖрокрпНрокро┐ро░ро┐роХрпНроХро╛, роЖро╕рпНродро┐ро░рпЗро▓ро┐ропро╛ рооро▒рпНро▒рпБроорпН роЕрогрпНроЯро╛ро░рпНроЯро┐роХро╛) Important Questions And Answers Study Material - QB365
NEW8th Standard
Tamilnadu 8th Standard Social Science рокрпБро╡ро┐ропро┐ропро▓рпН - родрпКро┤ро┐ро▓роХроЩрпНроХро│рпН Important Questions And Answers Study Material - QB365
NEW8th Standard
Tamilnadu 8th Standard Social Science ро╡ро░ро▓ро╛ро▒рпБ - роХро╛ро▓роЩрпНроХро│рпН родрпЛро▒рпБроорпН роЗроирпНродро┐ропрокрпН рокрпЖрогрпНроХро│ро┐ройрпН роиро┐ро▓рпИ Important Questions And Answers Study Material - QB365
Tamilnadu Stateboard 8th Standard Subjects
Tamilnadu Stateboard Standards