Answer:
4). 3
5). 600
Explanation:
formula of finding intrest earned is (p×r×t)/100
by putting this formulae____
( HERE p means principal , r means rate , t means time )
(p×r×t) /100= interest
(480×r×5) / 100=100.80
(336×r) / 100 = 100.80
336×r= 100.80×100
r= (100.80×100)/336
r=3
5). (p×r×t)/100=interest
(p×4×5) /100 = 120.00
p×4×5 = 120.00×100
p= 12000 / 4×5
P=12000/20
P=600