Question

Q.3 Solve the sums. [12]

21. Find the amount. Principal = 12000 `, Rate of interest = 12%, Time = 3 year.

23. Simplify and find the values if a = (-1) and b = (-2)

2a – 2b – 4 – 5 + a

24. Ramesh buy a T.V. for ` 10000 and sell it at a profit of 20%. How much money do I get for it?

OR

Selling price of a toy car is ` 540, if the profit made by shopkeeper is 20%, what is the cost price of this​

Answer 1

Answer:

21. SI= (P*T*R)/100

(12000*12*3)/100 = 4420

A= P+I

A= (12000+4420) = 16420

23.

2*(-1)-2*(-2)-4-5+(-1)= -8

24.

SP= CP+ (gain%/100)* CP

SP= 10000+ (20/100)* 10000

= 12000