Question

40 % of sum of money at 15%
per annum 50% of the neat at
10%
per
and the rest at
18 % per annum rate the simple
interest, what would be the anual
rate of interest. If the interest
is calealated on the whole sum?​

Answer 1

Step-by-step explanation:

Correct option is

C

14.4%

Let the whole sum be Rs. 100.

Then, sum at 15% p.a. = Rs. 40

Remaining sum = Rs. 60

∴ Sum at 10% p.a. =50% of Rs. 60= Rs. 30 and sum at 18% p.a. = Rs. 30

∴S.I. on Rs. 100 for 1 year =(

40×

100

15

×1

)+(

30×

100

10

×1

)+(

30×

100

18

×1

)

= Rs. (6+3+5.4)= Rs. 14.4

Hence, required rate =14.4%.

Answer 2

Answer:

The answer is 14.4%

Hope it helps

Step-by-step explanation:

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