Page 29 - WCS - Electrical

WORKSHOP CALCULATION & SCIENCE - 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 3)

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
16
= 0.16 3.6 3.6
100
100
Take home salary 76%
3.6 1
100
If the take home pay is Rs.76, his salary is 100.
100
76
3.6
For 1 % it is 1 3.6
76 1 1
100
For Rs .984.50, its is x 984.50
76
1
76
3.6
76 984.50
1
For 100% its is x 100 = 1295.39
1
16 984.50 76 76 X100 = 1295.39
0.16
=
76
X100 =
1295.39
100
100% i.e. gross pay = Rs.1295.40.
76 75
984.50
%
1
=
Example 1 75 200 x 10 X100 = 37 0 = 1295.39
1 100
2

76
=
%
=
100
x
1
37

76 3.6
75 litres of oil is taken out from a oil barrel of 200 litres capacity. Find out the percentage taken in this.
200 2

984.50
=
37
%

x =
1
= x +
Solution 100 15000 = 75 15x 100 100x + 15x
X100 = 1295.39 100x + 15x 100 2
15x 200100
% of oil taken = Oil taken out (litres) / Capacity of Barrel (litres) x 100
76 3.6
x +
=
15000 =
100
100
100x +
15x
75
1 x = 1500000 x + 13043.47 15x
15000 = =
=
= x 100 = 37 1 %
200 1500000 115 2 100 100
76
13043.47
=
x =
115
1500000
1 15x x = 100x + 15x = 13043.47
Example 2 x15000 = + = 115
76
100
100
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 purchase price (b) What is the profit.
984.50
1500000
= 1295.39=
X100
x =
13043.47
Solution: CP = x ,
76
115
CP = cost price
75

SP = sale price 100 x = = 37 1 2 %
200
SP=CP+15%of CP
15x 100x + 15x
15000 = x + =
100 100
1500000
x = = 13043.47
115
Profit = SP-CP = 15000-13043.47 = 1956.53
Purchase price = Rs.13,043/,Profit = Rs. 1957
16
CITS : WCS - Electrical - Exercise 3