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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Neat work!

M#641. The ratio of parallel sides of a trapezium is 3 : 2. If the height of the trapezium is 15 cm and its area is 135 square centimeters, then find the length of the longer parallel side.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Excellent!

M#642.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Neat work!

M#643. Find the diameter of a circle whose area is equal to the sum of the area of two circles (approximately) of radius 15 cm and 22 cm.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Neat work!

M # 644. A wire is bent in the form of a square of side 12 centimeters. If it is cut and bent in the form of a circle, find the radius of the circle. Use

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

*Last edited by irspow (2021-02-27 04:57:07)*

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Neat work!

M#645. Find the percentage increase in the area of the circle if its radius is increased by 50%.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Neat work!

M#646. If the area of a circular park is 62.82 hectares. Find the total cost of fencing the park at the rate of 72 cents per meter. Use

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 32,518

Hi,

Remarkable!

M#647.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**irspow****Member**- Registered: 2005-11-24
- Posts: 829

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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