To find Time when Principal Interest and Rate are given

To find Time when Principal Interest and Rate are given the rules are.

Interest = (Principal × Rate × Time)/100

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



Examples to find Time (T) when Principal (P), Interest (I) and Rate (R) are given:

1. Find Time when, Principal = $ 1500; Interest = $ 450; Rate = 5% p.a.

Solution:

Principal = $ 1500,

Interest = $ 450,

Rate = 5% p.a.

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

= (100 × 450)/(1500 × 5)

= 45000/7500

= 6.

Therefore, Time (T) = 6 years.



2. Find Time when, Principal = $ 2000; Interest = $ 600; Rate = 3% p.a.

Solution:

Principal = $ 2000,

Interest = $ 600,

Rate = 3% p.a.

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

= (100 × 600)/(2000 × 3)

= 60000/6000

= 10

Therefore, Time (T) = 10 years.



3. Find Time when, Principal = $ 3500; Interest = $ 700; Rate = 4% p.a.

Solution:

Principal = $ 3500,

Interest = $ 700,

Rate = 4% p.a.

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

= (100 × 700)/(3500 × 4)

= 70000/14000

= 5

Therefore, Time (T) = 5 years.

● Simple Interest.

Word Problems on Simple Interest.

Factors Affecting Interest

In Simple Interest when the Time is given in Months and Days.

To find Principal when Time Interest and Rate are given.

To find Rate when Principal Interest and Time are given .

To find Time when Principal Interest and Rate are given.

Worksheet on Simple Interest.

Worksheet on Factors affecting Interest








5th Grade Numbers Page

5th Grade Math Problems

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