Thickness of class 7 mathematics book is 20mm in standard form​

(i) 1 micron = (1)/( 1000000)m. Express it in standard from. (ii) Size of a bacteria = 0.0000004m. Express it in standard from. (iii) Thickness of a paper = 0.03 mm. Express it in standard form.

The cost of Mathematics book is Rs 25 3/4 and that of Science book is Rs 20 1/2dot Which costs more and by how much?

In a stack there are 4 books each of thickness 24 mm and 6 paper sheets each of thickness 0.015 mm. What is the total thickness of the stack in standard form ?

In a class of 45 students the ratio of the number of boys and girls is 4 :5 The average score of boys in mathematics is 78 .If the average score of all the students in the class in mathematics is 76 , then what is the average score of girls in mathematics ?

In a class of 45 students, the ratio of the number of boys and girls is 4:5. The average score of boys in mathematics is 78. If the average score of all the students in the class in mathematics is 76, then what is the average score of girls in mathematics?

A pile of Class-V Mathematics books has thickness of 14(2)/(5)cm" .If each book is 1(1)/(5)cm" thick,find how many books make up the pile.

A bag contains a total of 20 books on physics and mathematics. Ten books are chosen from the bag and it is found that it contains 6 books of mathematics. Find out the probability that the remaining books in the bag contains 2 books on mathematics.

Three sets of English, Hindi and Mathematics books have to be stacked in such a way that all the books are stored topic wise and the height of each stack is the same. The number of English books is 96, the number of Hindi books is 240 and the number of Mathematics books is 336. Assuming that the books are of the same thickness, determine the number of stacks of English, Hindi and Mathematics books.