Question

21.If Rs 800 is invested for 1 year at the rate of 20% p.a compounded half yearly find the compound interest at the end of 1 year. 
a.960
b.60
c.968
d.68​

Answer 1

Answer:

Rs. 1248

Step-by-step explanation:

As we know that,

A=P(1+

100

R

)

n

Here,

A= Amount

P= Principle =Rs.7500

R= Rate of interest =8%

n=1 year =2 half years

Therefore,

A=7500(1+

100

8

)

2

⇒A=7500(1+

25

2

)

2

⇒A=7500×

25×25

27×27

=12×729=Rs.8748

Therefore,

Compound interest =A−P=8748−7500=Rs.1248

Answer 2

Answer:

Why are cotton and woollen clothes rough and silk, rayon, nylon, polyester smooth to touch? ... Roughness of cotton and woollen fibre is due to presence of many folds and uneven surfaces in it. Silk, rayon, nylon and polyester are smooth because they have long plain, fine structure.10-Sept-2019

(f) Separation of cotton from seeds: (vi) Silk and wool

(j) Used to spin yams: (x) Cotton clothes

(d) Compressed bundles of cotton: (iv) Retting