Q4 of 20 Page 56

A piece of ribbon folded five times is placed along a 30 cm long measuring scale as shown in Fig. 10.2.


The length of the ribbon is between

The folded ribbon lies between 2 cm and 28 cm. So its length is the distance between 28 cm and 2 cm. It can be about (28-2) = 26 cm. The length of folded ribbon is nearly 26 cm.


The total length of ribbon is about 5×26 cm = 130 cm = 1.30 m. (100 cm = 1 m)


So, the length of the ribbon is 1.25 m-1.35 m.

More from this chapter

All 20 →
2

Which of the following does not express a time interval?

 3

Fig. 10.1 shows a measuring scale which is usually supplied with a geometry box. Which of the following distance cannot be measured with this scale by using it only once?

 5

Paheli moves on a straight road from point A to point C. She takes 20 minutes to cover a certain distance AB and 30 minutes to cover the rest of distance BC. She then turns back and takes 30 minutes to cover the distance CB and 20 minutes to cover the rest of the distance to her starting point. She makes 5 rounds on the road the same way. Paheli concludes that her motion is

 6

Bholu and Golu are playing in a ground. They start running from the same point A in the ground and reach point B at the same time by following the paths marked 1 and 2 respectively as shown in Fig. 10.3. Which of the following is/are true for the given situation.


As compared to Golu, Bholu covers a