Page 20 - CITS - WCS - Mechanical

WORKSHOP CALCULATION - CITS

Example
A fitter receives a take-home salary of 984.50 rupees.
If the deduction amounts to 24%, what is his total salary? (Fig 1)

Fig 1

16
= 0.16
16 100
= 0.16
100 100
16
100
100 3.6 = 0.16
Total pay 100%
3.6 100
Deduction 24% 100
100 3.6 3.6
Take home salary 76%
3.6 1
If the take home pay is Rs.76, his salary is 100.
100
1 76 3.6
For 1 % it is
16
=
0.16
100 76 1 1
For Rs .984.50, its is x 984.50
76
100
1
76
3.6
16 76
984.50
For 100% its is x 100 = 1295.39
1
0.16
=
100
1295.39
X100 =
3.6 100 984.50 76 76
1295.39
X100 =
100% i.e. gross pay = Rs.1295.40.
1
100
76

75
76
1
x
10
%
Example 1 = 984.50 X100 = 37 0 = 1295.39
3.6
2
75 200

76
1
%
37
=
100
=

x
1
75 litres of oil is taken out from a oil barrel of 200 litres capacity. Find out the percentage taken in this.
76 100 200 2

Solution 15000 = 75 15x 100 100x + 15x

%
37
=
1
x =
984.50 3.6
= x +
2

X100 =
15x 200100
15x 100
1295.39
100x +
% of oil taken = Oil taken out (litres) / Capacity of Barrel (litres) x 100
76
1 15000 = x + =
100
100
75 1500000 15x 100x + 15x
x
= 76 100 = 37 1 % x + 13043.47
15000 = =
x = 2
200 1500000 115 100 = 100
1 x = 100x + 15x = 13043.47
15x
Example 2 =+=
15000 x 100 115 1500000
100
76
x =
13043.47
=
A spare part is sold with 15%. Profit to a customer, to a price of Rs.15000/-. Find out the following (a) What is the
1500000 115
purchase price (b) What is the profit.
x = = 13043.47
984.50
115
X100 =
Solution: CP = x , 1295.39
76
CP = cost price

75
SP = sale price = 37 1 %
x
100
=
200
SP=CP+15%of CP 2
15x 100x + 15x
15000 = x + =
100 100
1500000
x = = 13043.47
115
7
CITS : WCS - Mechanical - Exercise 3