The interest on ₹ 30000 for 3 years at the rate of 15% per annum is
(a) ₹ 4500
(b) ₹ 9000
(c) ₹ 18000
(d) ₹ 13500
SI = \(\dfrac{30000 \times 15 \times 3}{100} = 13500\).