## A chair is sold for Rs.825. gain is 10%. find C.P.

S.P. = 825 gain = 10% C.P. = 825 $\times$ $\frac{100}{100 + 10}$ 825 $\times$ $\frac{100}{110}$ = 750 C.P. = 750

## A radio is bought for Rs.750 and sold for 4% loss. Find S.P.

C.P. = 750                                          loss = 4% S.P. = 750 $\times$ $\frac{100 – 4}{100}$ 750 $\times$ $\frac{96}{100}$ = 360

## A man bought an object for Rs.750 and sold for 10% gain. Find S.P.

C.P. = 750                                  gain = 10% S.P. = 750 $\times$ $\frac{100 + 10}{100}$ 750 $\times$ $\frac{110}{100}$ = 825 $\therefore$ S.P. = 825

## A man bought a cycle for Rs.450 and sold for Rs.405. find the loss percent.

Loss = 450 – 405 = 45 Loss% = $\frac{45}{450}$ $\times$ 100 = 10 $\therefore$ loss% = 10

## A man bought a book for Rs.450 and sold for Rs.495.Find the gain percent.

S.P. = 495 C.P. = 450 Gain = 495 – 450 = 45 Gain % = $\frac{45}{450}$ $\times$ 100 = 10 $\therefore$ gain% = 10

## How many minutes does Ashok take to cover a distance of 400 meters if he runs at a speed of 20 km/hr ?

Ashok’s speed = 20 km/hr = $(20\times \frac{5}{18})$m/sec $=$ $(\frac{50}{9})$ m/sec Time taken to cover 400 meters = $(400\times \frac{9}{50})$sec = 72 sec = 1$\frac{1}{5}$ minutes

## 180 meter long train crosses a man standing on the platform in 6 seconds. What is the speed of the train ?

Speed = $\frac{Distance}{Time}$ = $\frac{180}{6}$ = 30 meters 30 $\times$ $\frac{18}{5}$ = 108 km/hr