Question

a principal of rupees800 amounts to rupees1120 in 2 years. The rate of simple interest is:

(a) 2%p.a
(b) 16%p.a
(c) 18%p.a
(d) 20%p.a​

Answer 1

Answer:

❥˙. (d) 20% p.a

Step by step explanation :-

given ,

Amount = 1120

Principal = 800

Time period = 2 years

ꜱɪᴍᴘʟᴇ ɪɴᴛᴇʀᴇꜱᴛ = ᴀᴍᴏᴜɴᴛ - ᴘʀɪɴɪᴘᴀʟ

. . = 1120 - 800

, . = 320

____________________

where ,

si = simple interest

p = principal

r = rate of interest

t = time period

t = 2 years

$si = \frac{prt}{100}$

$r = \frac{si \times 100}{pt}$

$r = \frac{320 \times 100}{800 \times 2}$

$r = \frac{32000}{1600}$

$r = 20\%$

✧ ꜱᴏ, ᴛʜᴇ ʀᴀᴛᴇ ɪꜱ 20% ✧。