NCERT Exemplar Solutions Class 6 Mathematics Solutions for Exercise in Chapter 1 - Number System

Question 88 Exercise

(a) 10 million = _____ crore.

(b) 10 lakh = _____ million.


(a).10 million = 1 crore

We know that, 1 million = 10 lakh

Then, 10 million = 10 × 10 = 100 lakh = 1,00,00,000

Therefore, 10 million = 1 crore.

(b). 10 lakh = 1 million.

Video transcript
"hello student welcome back on the leader.solving session and in today's little session we are going to check whether the given statement is true or false okay so i will read the statement first the volume of a sphere is equal to two third of volume of cylinder whose height and diameter are equal to the diameter of sphere all right so let's check so according to the question according to given question okay height and the diameter of the cylinder is equal to the diameter of sphere right which is which is given here so height and diameter of cylinder is equals to diameter of sphere diameter of sphere okay that means okay height of the cylinder okay h is equals to okay twice of one right that's why height of cylinder is equals to diameter of diameter of the sphere that is d or we can call it as an twice of r right because diameter is a double of radius right and again okay both are having the same radius right because their diameter is also same right that's why radius okay of cylinder is equals to radius of sphere which is equals to r all right okay now what we'll do we'll apply formula so first okay we know that volume of cylinder column of cylinder is equals to pi r square h that is the standard formula right but here okay we know that the height of the cylinder is okay is equals to the diameter of square which is 2r right so is equals to pi r square okay and we'll replace h with twice of r so which is equals to 2 pi r cube all right that will be the volume of given cylinder right okay now we'll apply the standard formula for volume of sphere okay and volume of sphere is equal to 4 upon 3 pi r cube right ok now if you compare okay volume of cylinder and volume of sphere okay we'll get to know that the volume of sphere is equals to the two thirds of the volume of cylinder right okay that's why volume of the cylinder that's why we can say that volume of cylinder is equals to okay two thirds of okay volume of sphere right volume of sphere volume of sphere that means the given statement is true right i hope you understood the concept uh if you are any doubt please leave the comment below and please do subscribe to this channel thanks for watching the video bye "
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