Question

Solve the following word problems.
(a) Find the principal when:
(1) Time = 3 years, simple interest = 3600 and rate of interest = 4% p.a.
(ii) Time = 4 years, simple interest = 400 and rate of interest = 5% p.a.
this is the question of Math chapter name commercial math ​

Answer 1

Answer:

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Step-by-step explanation:

Time = 3 years,

Interest = $ 600,

Rate = 4% p.a.

 

Principal = (100 × Interest)/(Rate × Time)

= (100 × 600)/(4 × 3)

= 60000/12

= 5000

Therefore, Principal (P) = $ 5000.

Answer 2

Answer:

(i) 30000

(ii) 2000

Step-by-step explanation:

i.

x×4/100 ×3=3600

12x = 360000

x=30000

ii.

x× 5/100 × 4 = 400

20x = 40000

x = 2000