Question

Q1 Find the Third proportional to 4, 12.

O2 - The pric of T. v. is increased by 10%If present price is Rs. 4
11,880 . Find theoriginal price.

please answer​

Answer 1

Answer:

Ans 1) let a = 4 , b = 12 and c is the required third proportional

since , we know that third proportional of two numbers a, b is defined as ,

a : b = b : c

so now

4 : 12 = 12 : c

4 / 12 = 12 / c

4 × c = 12 × 12

4c = 144

c = 36

hence , third proportional = 36

_______________________________

Your Answer : 36

Ans 2) Let the cost price be =100

and now after increasing selling price will be =100+10=110

we want cost price so,100/110*11880

solve this your answer will be=10800