In what time will ₹ 3600 amount to ₹ 4410 at 9% per annum simple interest?

In what time will ₹3600 amount to ₹4320 at 8% per annum simple interest?

In what time will ₹ 6000 amount to ₹6360 at 8% per annum simple interest?

In what time will ₹8000 amount to ₹8360 at 6% per annum simple interest?

In what time will Rs 64000 amount to Rs 68921 at 5% per annum, interest being compounded half-yearly?

What sum will amount to ₹6600 in 2 year at 10% per annum simple interest?

In what time will a sum double itself at 4% per annum, at simple interest ?

What sum will amount to ₹5525 at 10% per annum simple interest in 3 years?

A sum of money invested for 2 years at 6.5% per annum simple interest amounted to Rs 9040. What will it amount in 3 years 3 months at 9% per annum simple interest?

What sum will amount to Rs. 6,600 in 4 years at 8% per annum simple interest?