Question

c. i. Find the diameter of a circle whose circumference is 42.4 m.
ii. Find the time when;
P= Rs 6400, S.I= Rs 1152 and rate 'T'= 6% p.a.​

Answer 1

Step-by-step explanation:

i) circumference = 2πr

2 x 22/7 x r = 42.4m

r x 2 x 22 = 42.4 x 7

r = 296.8 / 44

= 6m

diameter = 2 x radius

2 x 6m = 12m

ii) time = interest x 100 / principal x rate

= 1152 x 100 / 6400 x 6

= 115200 / 38400

= 3 years