Four children measures the length of a table which is about 2.5 m. Each of them uses different ways to measure it.
(i) Ram measures it with a one metre long thread.
(ii) Rahim measures it with a 15 cm scale from her geometry box.
(iii) Reena measures it using her hand span.
(iv) Rahul measures it using a 4 m long measuring tape.
Which one of them will get the most accurate length? Give reason for your answer.

Open in App

Solution

The length measured by Rahul will be the most accurate because he is using a 4 m long measuring tape which is longer than the table.
So, he can measure the length of the table in one go accurately.
While in the other cases the chance of making an error is higher due to multiple measurements.
Reena is using her hand span which is not a standard unit of measurement and leads to inaccurate measurement of length.
In case of Ram, only those lengths can be measured which are exact multiples of one metre. Also, using a one metre thread alone to measure the table might give inaccurate results as it cannot be used in one go.

Suggest Corrections

Similar questions

Q. Four children measures the length of a table which is about 2 m. Each of them uses different ways to measure it.
(i) Sam measures it with a half metre long thread.
(ii) Gurmeet measures it with a 15 cm scale from her geometry box.
(iii) Reena measures it using her hand span.
(iv) Salim measures it using a 5 m long measuring tape.
Which one of them will get the most accurate length? Give reason for your answer.

Q. Samhita measures the length of a

1 m

table using a measuring tape that has a broken zero marking. If her measurement turns to be

3 cm

more than the actual length of the table, which of the following statements is true?

Q. A 15 cm scale has one end broken. How would you use it to measure the length of a thread 3.6 cm long? Draw a diagram to explain the same.

Q. A teacher asked her students to measure the length of their classroom.
Rekha said, 'I can do it by counting my footsteps.'
Renu said, 'I will measure it using my skipping rope.'
Ramesh said, 'I will measure it using a measuring tape.'
Which of these is true?
(a) Only Rekha will be able to measure the room's length.
(b) Only Ramesh will be able to do that.
(c) All will be able to do it, but Renu's method is best.
(d) All will be able to do it, but Ramesh' method is best.

Use the following information to answer the next question.

Akram has a piece of thread. He measures the length of a table using this thread. He has to place the thread eight times along the length of the table to measure its length. Then, he folds the thread twice at its mid point and again measures the length of the same table.

How many times does Akram have to place the folded thread along the length of the table?

Join BYJU'S Learning Program