V K Raman and S N Sharma Solutions for Exercise 4: MASTERY TEST-3

A car travelled $60$ km in $2\frac{1}{2}$ hours. For the first half of the journey, it travelled at $20$ km/ h. FInd its speed for the second half of the journey.

Govind sold a camera to Gopal for $₨1620$ at a gain of  $8\%$. Gopal sold it to Gokul for $₨1539$. Caculate the gain or loss percent to Gopal.

The cost price of an article is  $₨150$.After giving a discount of  $10\%$,there must be a profit of  $20\%$.Find $S.P$.

The cost price of an article is  $₨150$.After giving a discount of  $10\%$,there must be a profit of  $20\%$.Find $M.P$.

$₹8000$ was lent at compound interest for $2 \mathrm{years}$ at a certain rate. It amounted to $₹8400$ after one year. Find the amount at the end of second year.

Calculate the compound interest on $₹10,000$ for $2 \mathrm{years}$ if the rate is $8\%$ and $10\%$ for the first and second year respectively. Find also the compound interest for the second year alone.

A certain sum of money amounted to $₹8400$ after $1 \mathrm{year}$ and to $₹8820$ after $2 \mathrm{years}$ at C.I. Find the rate.

A certain sum of money amounted to $₹8400$ after $1 \mathrm{year}$ and to $₹8820$ after $2 \mathrm{years}$ at C. I. Find the sum of money.