
Mark a line segment OB = 9.3 on number line. Further, take BC of 1 unit.
Find the midpoint D of OC and draw a semi - circle on OC while taking D as its centre.
Draw a perpendicular to line OC passing through point B. Let it intersect the semi - circle at E.
Taking B as centre and BE as radius, draw an arc intersecting number line at F.
Hence BF is \(\sqrt9.3\).
Length (in hours) | Number of lamps |
|---|---|
300 − 400 | 14 |
400 − 500 | 56 |
500 − 600 | 60 |
600 − 700 | 86 |
700 − 800 | 74 |
800 − 900 | 62 |
900 − 1000 | 48 |
(i) Represent the given information with the help of a histogram.
(ii) How many lamps have a lifetime of more than 700 hours?
Why was Santosh sent to the local school?