Question

640 amount to 784 in 2 1/2 years. What will * 900 amount to in 4 years at the
same rate percent per annum?​

Answer 1

Answer:

Rs 1143

Step-by-step explanation:

given principle = P1 = Rs 640

and amount = A1 = Rs 784

therefore, simple interest = SI1 = amount - principal

= A1-P1 = Rs 784 - Rs 640

= Rs 144

Time= T1 = 2yrs. and 6 months = 2.5 yrs.

S.I= P×R×T/100

therefore, Rate = R1= SI1×100/P1×T1

= 144×100 / 640×2.5

=14400 / 1600

= 9%

principle given again = P2 = Rs 900

rate% we have find out = R2= 9%

time given = T2 = 3 yrs.

SI2 = P2 × R2 × T2 /100

= 900×9×3/100

= Rs 243

A = P2 + SI2

= 900+243

= Rs 1143

HOPE IT HELPS,

PLEASE THANK , FOLLOW AND MARK AS BRAINLIEST.

Answer 2

hope it helps...check the above question answer