Why is a manhole cover round?

Answer Posted / vasanth kr. mannam

The manhole covers which are Square or rectangle can be
easily put inside the hole by holding it diagonally.

But in case of circle, it is same in all the angles and safe
to use for man holes.

Is This Answer Correct ?    13 Yes 2 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

A triangle ABC is given, a line DE is parallel to base side and that cuts the triangle. The ratio of area of triangle to the area of trapezium given DE/BC= ?

769


A cycled from P to Q at 10 kmph and returned at the rate of 9 kmph. B cycled both ways at 12 kmph. In the whole journey B took 10 minutes less than A. Find the distance between P and Q.

820


2. Why would you choose a database system instead of simply storing data in operating system files? Give and explain advantages of using DBMS.

1026


If wind flows 160 miles in 330 min, for 80 miles how much time required.

766


Denominator is 4 greater than numerator if 10 is added to Denominator,the fraction becomes 1/8.what is the fraction.

714






1, 11, 21, 1211, 111221, 312211, . . . . . what is the next term in the series?

759


Fathers age is 5 times his son's age. 4 years back the father was 9 times older than son.Find the fathers' present age.

895


USA + USSR = PEACE ; P + E + A + C + E = ?

1172


There are two candles with different thickness, but are of equal length. The thicker one lasts of six hours and the thinner candle last for 2 hours less than the thicker one. Suresh lights the two candles at the same time. When he went to bed he saw the thicker one is twice the length of the thinner one. For how long did Suresh light the two candles.

695


There is a rectangular terrace whose length and width are 60m X 20m. There is a walkway of uniform width around terrace. Area of walkway is 516m^2. Find width of walkway:

805


In a class total 34 students, 16 are have a brother, 15 are have sisters, 9 students don't have either brothers or sisters.Find the number of students having both brother and sisters.

1118


How many mashes are there in a sq. m of wire gauge. Each mesh being 8mm long X 5mm width

726


if f(x)=1/x then f(f(f(x))) equals

828


A work is done by the people in 24 min. one of them can do this work a lonely in 40 min. how much time required to do the same work for the second person.

771


Fallin height is proportional to square of the time. One object falls 64 cm in 2 sec. than in 6 sec. from how much height the object will fall?

749