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Naushad malik

· started a discussion

· 1 Months ago

Is there any short way to take a sq. Root

Question:
A motorist travels along the boundary of a square field of area 1476225 m2, at 36 km/hr. He returns to starting point in–
Options:
A) 8 min 8 sec
B) 6 min 8 sec
C) 8 min 6 sec
D) 6 min 6 sec
Solution:
Ans: (c) Perimeter of the square field = \(\sqrt{1476225}\)   m

= 4 × 1215 m = 4860 m

speed of the man = 36 km/h 

=  36 × \(\cfrac{5}{18}\)

= 10 m/s 

Time taken by motorist =  \(\cfrac{4860}{10}\)   seconds

= 486 seconds

= 8 min. 6 sec.

Naushad malik

· commented

· 1 Months ago

Are koi short way hai sq root itna bada sq root nikalne ka

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