Sanju fell down while playing on the ‘Monkey bars’ in the playground. He was unable to lift his arm as it pained very badly. His friends Parul, kabir and Shravan made him comfortable and calmed him. Kabir ran and called his mother who took him to the doctor immediately. His elbow had swollen and had turned red. The doctor took an X-ray of the elbow region and said that there was no fracture. He tied a crepe bandage in the area of pain and said that it was just a sprain. Sanju gave rest to the arm for a week and it was fit as before.
Questions:
i) Why did the doctor take an X-ray of the arm?
ii) What does an X-ray show?
iii) What do you think about the nature of Sanju’s friends - Parul, kabir and Shravan?
iv) What safety measures should one take if there is a sprain in any part of the body?
DO NOT GIVE IRREVELANT ANSWERS GIVE PROPER ANSWERS......
Answers
Answer:
Given : √6.8 , root 6.8
To find : To be represented on Number line
Solution:
Step 1 : Draw a Number line
Step 2 : Take a point A at - 6.8 on Number line
Step 3 : Using Appropriate Compass Width taking 1 & -6.8 as center draw arcs on both sides of number line intersecting at X & Y
Step 4 : Join X & Y intersecting number line at M ( - 2.9 ) we could also directly take -2.9 point
Step 5 : Taking point M as center and compass width upto A (-6.8) or point 1 Draw a semicircle
Step 6 : Draw a right angle at O (zero) on number line intersecting semicircle at P
Step 7 : Taking O (zero) as center & taking compass width = OP draw an arc intersecting number line on positive side at B
point B represent √6.8 on number line
OP² = ((6.8 + 1)/2)² - ((6.8 + 1)/2 - 1)²
= 3.9² - 2.9²
= (3.9 + 2.9)(3.9 - 2.9)
= (6.8)(1)
= 6.8
=> OP = √6.8
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