Question

plz solve the 15th question

Answer 1

Amount in 5 years = (p + si for 5 yrs) = ₹ 4160
Amount in 2 years = (p + si for 2 yrs) = ₹ 3224
On subtracting, we get:
SI for 3 years = ₹(4160 - 3224) = ₹936
SI for 2 years = ₹(936 ÷ 3 × 2) = ₹624
p = (amount for 2 yrs) - (SI for 2 yrs) = ₹ 2600
Now, p=₹2600, si=₹624, time=2 yrs.
rate = (100×SI) ÷ (p×t) = 12% p.a.
{I've not done the calculations. They are left for you}