Question

A certain sum of money smnts 2500 in a span of 5 yeats and further to 3000

Answer 1

Answer:

let sum = P

let rate = R %

P+5PR/100 = 2500

100P+5PR = 250000

20P+PR = 50000 -----------------------(1)

similarly,

P+7PR/100 = 3000

100P + 7PR = 300000 -------------------(2)

solving both equation now ,

[ multiply equation (1) by 7 and subtracting (2) ]

140P + 7PR = 350000

100P +7PR = 300000

------------------------------

40P = 50000

P = 1250 (Ans.)

[ mark as brainlist if you understand ]

Answer 2

2500 in 5th year and 3000 in 7th year

 

So in between 2 years Rs. 500 is increased => for a year 500/2 = 250

So, per year it is increasing Rs.250

then in 5 years => 250 x 5 = 1250

Hence, the initial amount must be 2500 - 1250 = Rs. 1250