Question

The product of two successive multiples of 10 is 1200. Then find these multiples:10 के 2 लगातार गुणजों का गुणनफल 1200 है, तो गुणजों का मूल्य पता करें. *
20, 30
48, 25
60, 20
30, 40​

Answer 1

Answer:

D. option is correct . 30 ,40

Answer 2

Given:

The product of two successive multiples of 10 is 1200.

To find:

The successive multiples.

Solution:

Let the first multiple of 10 is x.

Its successive multiple is x+10

According to the question:

=> x (x+10) = 1200

=> x²+10x-1200 = 0

=> x²-30x+40x-1200 = 0

=> x(x-30)+40(x-30) = 0

=> (x+40)(x-30) = 0

=> x+40=0 or x-30=0

=> x+40=0

=> x = -40

Here, the multiples are -40 and -30

=> x-30=0

=> x=30

Here, the multiples are 30 and 40

Hence, two successive multiples are 30 and 40 (or) -40 and -30

Verify :

The product of two successive multiples of 10 is 1200.

=> 30 x 40 = 1200

or

=> -40 x -30 = 1200.