Shikkan boy lends Rs. $2, 800$ for $4$ years at $6 \frac{1}{2}$ per cent per annum and Rs. $6, 550$ for $5$ years at $8$ per cent per annum. Find her total earning from these investments.

Rs.

3, 348

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Rs.

2, 813

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Rs.

2, 637

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Rs.

2, 745

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Solution

The correct option is B Rs. $3, 348$
We have, $P =$ Rs. $2800, T = 4$ yeras and $R = 6 \frac{1}{2} % = \frac{13}{2} %$
$\Rightarrow$ $S . I . = \frac{P \times R \times T}{100} = \frac{2800 \times 13 \times 4}{2 \times 100} =$ Rs. $728$ .....(1)
$\Rightarrow$ Now, $P =$ Rs. $6550, T = 5$ years and $R = 8 %$ .
$\Rightarrow$ $S . I . = \frac{6550 \times 8 \times 5}{100} =$ Rs. $2620.$ ......(2)
Therefore, total earning investments $=$ Rs. $728$ $+$ Rs. $2620 =$ Rs. $3, 348.$

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Shikkan boy lends Rs. 2,800 for 4 years at 612 per cent per annum and Rs. 6,550 for 5 years at 8 per cent per annum. Find her total earning from these investments.

The correct option is B Rs. 3,348We have, P= Rs. 2800,T=4 yeras and R=612%=132%⇒ S.I.=P×R×T100=2800×13×42×100= Rs. 728 .....(1)⇒ Now, P= Rs. 6550,T=5 years and R=8%.⇒ S.I.=6550×8×5100= Rs. 2620. ......(2)Therefore, total earning investments = Rs. 728 + Rs. 2620= Rs. 3,348.

Shikkan boy lends Rs. $2, 800$ for $4$ years at $6 \frac{1}{2}$ per cent per annum and Rs. $6, 550$ for $5$ years at $8$ per cent per annum. Find her total earning from these investments.