SI rate found from one deal, then applied to another sum or rate: amount

This type of question, asked 4 times: 14 Jul 2023 S4, 21 Jul 2023 S1, 25 Jul 2023 S2, 26 Sep 2024 S1. All 4 questions below, oldest first.

Try each one first, then open its answer.

Question 1
14 Jul 2023 S4
56 $If ₹72 amounts to ₹104.4 in 3 years, what will ₹120 amount to in 5 years at the same rate percent per annum?$
Tap an option to check your answer.
Question 2
21 Jul 2023 S1
66 $At simple interest a sum of ₹6,400 becomes ₹8,320 in 3 years. What will ₹7,200 become in 5 years at the same rate?$
Tap an option to check your answer.
Question 3
25 Jul 2023 S2
75 $₹8,500 becomes ₹11,050 in 6 years at a certain rate of simple interest. If the rate becomes 1.8 times of itself, the amount of the same principal in 5 years will be:$
Tap an option to check your answer.
Question 4
26 Sep 2024 S1
57 $If ₹1,875 becomes ₹2,625 in 4 years, what will ₹24,000 become at the end of 9 years at the same rate of interest, under simple interest?$
Tap an option to check your answer.

Question 1