Question

68/21 = x+1/y+1/z then find x,y,z if x,y,z £N

Answer 1

Find the compound interest on 15,000 for two years at 8% per annum.

¹year

Principal = ®15,000

Time = 1 year

Rate of Interest = 8% p.a.

Simple Interest =

$\frac{p \times r \times t}{100}$

$= \frac{15000 \times 8 \times 1}{100}$

= ® 1,200

Interest for the first year = ®1,200

::

Amount = P + S.I.

= 15,000+ 1,200

So,

= 16,200

²year

In the second year, the amount in the first year becomes the principal here.

So we have,

Principal =®16,200

Time = 1 year

Rate of Interest = 8% p.a.

Simple Interest =

16,200x1x8 100

= ®1,296

So, Compound Interest for two years = ®1,200 +®1,296 = ®2,496

• note:-®=Ruppe