Question

Rupees 4000 amounts to rupees 5000 in 8 years in what time will rupees 2100 become rupees 2800 at the same rate?

Answer 1

4000 amount to Rs.5000 in 8 years.

SI = 5000 - 4000 = 1000
R=100*SI/P*T=100*1000/4000*8=25/8%
For Rs. 2100 to become Rs. 2800, SI = 2800 - 2100 = 700
T=100×SI/P×R=100×700/(2100×25/8)


=100/(3×25/8)


=4/(3×18)
=

32/3=10 2/23 years =10+2/3 years