Question

p=rs15000 R=10% T=2*5/1

Answer 1

Simple interest= p x r xt/100
S.I= 15000 x 10 x 2.5/100
SI= 3750 rs

Answer 2

si=prt/100
=15000*10*10/100
=15000
amount=15000+15000
=30000. ans

hope it is right.