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Deepak BoraNewbie

Asked: August 3, 2020In: CBSE

If the total surface area of a solid hemisphere is 462 cm² , then find its volume

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surface area of a solid hemisphere is given in the problem by using relation of volume and surface area find ...Read more

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Deepak BoraNewbie

Asked: August 8, 2020In: CBSE

A cubical block of side 10 cm is surmounted by a hemisphere. What is the largest diameter that the hemisphere can have? Find the cost of painting the total surface area of the solid so formed, at the rate of 5 per 100 sq cm.

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In this problem use π = 3.14. Last time this problem was asked in cbse 2015 board exam. Question number ...Read more

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Deepak BoraNewbie

Asked: August 9, 2020In: CBSE

Water in a canal, 5.4 m wide and 1.8 m deep, is flowing with a speed of 25 km/hr. How much area can it irrigate in 40 minutes, if 10 cm of standing water is required for irrigation?

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This is one of the important question from the cbse board exam point of view because in 2017 cbse board ...Read more

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Deepak BoraNewbie

Asked: August 12, 2020In: CBSE

A solid cone of base radius 10 cm is cut into two parts through the midpoint of its height, by a plane parallel to its base. Find the ratio of the volumes of the two parts of the cone.

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This question was asked in 2013 cbse board exam. Problem from RS Aggarwal book, problem number 17, page number 824, exercise ...Read more

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Deepak BoraNewbie

Asked: August 29, 2020In: CBSE

The radii of two cylinders are in the ratio of 2 : 3 and their heights are in the ratio of 5 : 3. Find the ratio of their volumes.

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Problem from RS Aggarwal book, problem number 9, page number 826, exercise 17D, chapter volume and surface area of solid. ...Read more

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Deepak BoraNewbie

Asked: August 31, 2020In: CBSE, Competition, ICSE, IIT

Argument of a Complex Number

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Why does the Principal Argument of any Complex Number lie between -π to π. ? Isn’t that the Equivalent of ...Read more

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Deepak BoraNewbie

Asked: September 8, 2020In: CBSE, ICSE

A train covered a certain distance at a uniform speed. If the train had been 5kmph faster, it would have taken 3 hours less than the scheduled time. And, if the train were slower by 4 kmph, it would have taken 3 hours more than the scheduled time. find the length of the journey.

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An Important question based on Linear Equations in two Variables Chapter of R.S Aggarwal book for ICSE & CBSE ...Read more

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If the total surface area of a solid hemisphere is 462 cm² , then find its volume

A cubical block of side 10 cm is surmounted by a hemisphere. What is the largest diameter that the hemisphere can have? Find the cost of painting the total surface area of the solid so formed, at the rate of 5 per 100 sq cm.

Water in a canal, 5.4 m wide and 1.8 m deep, is flowing with a speed of 25 km/hr. How much area can it irrigate in 40 minutes, if 10 cm of standing water is required for irrigation?

A solid cone of base radius 10 cm is cut into two parts through the midpoint of its height, by a plane parallel to its base. Find the ratio of the volumes of the two parts of the cone.

The radii of two cylinders are in the ratio of 2 : 3 and their heights are in the ratio of 5 : 3. Find the ratio of their volumes.

Argument of a Complex Number

A train covered a certain distance at a uniform speed. If the train had been 5kmph faster, it would have taken 3 hours less than the scheduled time. And, if the train were slower by 4 kmph, it would have taken 3 hours more than the scheduled time. find the length of the journey.