Question

S
8. In the market cost of 1 dozen bananas are 48. Find the cost of 10 bananas
9. If the ratio of angles of a trangle is 23:4, then find the measure of these angles.
10. 1575% of x is 18 then find the value of x.
11. Chalk contains Calcium Carbon and Oxygen in the ratio 10:3:12 Find the percentage of
chalk
12. In a city, 35% are females, 45% are males and remaining are children. What % are childre
13. Compute the Simple Interest on a sum of 2 900 for 5 years at the ratio of 6% per annum
14. The cost price of 8 books is equal to the selling price of 6 books. Find the gain percent
15. What principal will amount to 2 900 in 6 years at 10% Simple Interest?
16. There are 120 children live in Seemapun 'I' Black. Accorching to servery conducted in 201
these 24 children do not go to school" Under the project "School Chale Hum" these student
ted in school on the basis of above statement answer the following questions
(a) In 2014, how many children did not go to school?
(b) Under the Project "School Chale Hum" How many children admitted in school.
Studiestoday
Class 7 Maths Comparing
Visit​

Answer 1

Answer:

(8) Cost of 1 dozen bananas = ₹48

Cost of 1 banana. = 48/12

= ₹4

Cost of 10 bananas. = 4*10

= ₹40

(9) Given ratio of angles = 2:3:4

Sum of all angles of triangle = 180°

2x+3x+4x = 180°

9x = 180°

x = 180°/9

x = 20°

Hence, 2x = 2*20 = 40°

3x = 3*20 = 60°

4x = 4*20 = 80°

(10) Acc. to the statement,

1575% * x = 18

1575/100 * x = 18

1575 * x = 18*100

1575x = 1800

x = 1800/1575

x = 52/63