Question

1) A retailer buys a radio for Rs.225. his overhead expense are Rs15. if he sells the radio for Rs.300, determine the profit percentage.

2) Meera's mother is four times as old as Meera. After five years , she will be three times as old as Meera will be then.Find their present ages​

Answer 1

Answer:

1) Cost price of radio= Bought price+overhead expanses

Hence, CP=Rs. (225+15)=Rs. 240

SP=Rs. 300.

Since, SP>CP, so retailer get profit.

Profit=SP−CP=300−240=Rs. 60

Profit(%)=

CP

profit

×100=

240

60

×100=25%

2) Let present age of Meera =x years

Let present age of Meera's mother =y years

After five years age of Meera =(x+5) years

After five years age of Meera's mother =(y+5) years

According to problem,

y=4x …………..(1)

y+5=3(x+5) ………(2)

Put (1) in (2), we get

4x+5=3x+15

4x−3x=15−5

x=10

y=40

∴ Meera's present age =10 years

Meera's mother's present age =40 years.

Step-by-step explanation:

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Answer 2

1) Actual C.P. = 225 + 15 = 240 Rs.

Gain = 300 – 240 = 60 Rs.

∴ Gain per cent =

= $\frac{60}{240}\times 100 = 25\%$

2) Then the present age of Meera's mother = 4x years. Meera's age after five years = (x + 5) years. Meera's mother age after five years = (4x + 5) years. Thus, age of Meera = 10 years and that of Meera's mother = 4 x 10 = 40 years.

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