SGBAU B. Com Part 2 Question Paper 2019 of Business Mathematics Fully Solved here  Section C

SECTION 'C'

1. Find out the LCM and HCF of 144, 216, 288.

Solution : 

144 = 72*2

=36*2*2

=6*6*2*2

=2*3*2*3*2*2

216=108*2

=2*2*54

=2*2*2*27

=2*2*2*9*3

=2*2*2*3*3*3

268=134*2

=67*2*2

HCF = 2*2=4

LCM =2*2*3*3*2*2*3*67=28944

2.  A publisher sells 80 books of business mathematics for Rs. 6144. If the list price of the books be Rs 96 . Calculate the rate of trade discount.

Solution:      

     80 books for Rs 6144.

list price Rs. 96

Selling Price= 6144

 Discount = List price - selling price

= 7680-6144

=1536

Calculation of Rate of Discount= 1536/7680*100=20%

therefore, the rate of trade discount will be 20%

3. A purchase an article for Rs. 1050 and sold it for 1197. B also purchased similar article for Rs.960 and sold it for Rs. 1104. Find who had a better profit percdentage.

solution : 

Profit of A = SP-CP

=1197-1050=147

Profit of B=1104-960 = 144

A. CP=1050 

Profit= 147

suppose profit on 100 is x.

=profit/cp*100

=147/1050*100 = 14%

B. CP=1104

profit= 960/1104*100

= 15%

therefore B has better profit percentage.

4. The amount with simple interest Rs. 4000 at a certain rate of interest is Rs 5000 in 5 years. Find out the rate of interest per annum.

solution : P=4000, A=5000, N=5 ,

 SI= A - P =5000-4000= 1000

SI =P*N*R/100

1000= 4000*5*R/100

R= 5%

5. 12 men and 20 women working 10 hours a day can finish a piece of work in 35 days. In how many days 12 men and 20 women can do the same work by working 7 hours a day ?

solution: 

later no of days /initial no of days = initial no of hours/ later no of hours

x/35=10/7

7x=350

x=350/7

x= 50

So in 50 days 12 men and 20 women can do the same work by working 7 hours a day.