Question

Solve it ......... ................



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Answer 1

Step-by-step explanation:

(i)

Selling price = 418

Gain = 10%.

Cost price = [100/(100 + Gain%)] * SP

                  = [100/(110)] * 418

                  = 41800/110

                  = 380

Therefore, cost price = 380.

(ii)

P = 50000, R = 8%, n = 2 years.

A = P(1 + r/100)^n

   = 50000(1 + 8/100)²

   = 50000(108/100)²

   = 50000(1.1664)

   = 58320

∴ CI = A - P

       = 58320 - 50000

       = 8320.

Therefore, Compound Interest = 8320.

(iii)

Given, angles are: (2x + 25) and (3x - 5).

∴ Sum of adjacent angles of parallelogram is 180°

⇒ 2x + 25 + 3x - 5 = 180°

⇒ 5x + 20 = 180°

⇒ 5x = 160°

⇒ x = 32°

Therefore, value of x = 32°

(iv)

The bisectors of any two adjacent angles of a parallelogram intersect at right angles - 90°.

Hope it helps!

Answer 2

1)380

2)8320 may be but my ans 8320

3)32

4)90

.... solution is above attached.........