Question

CIRCLE :

1. Add 2 h 25 min + 45 min

2. Subtract 8 min 10 sec – 7 min 2sec

SQUARE :

1. Add 3 years 7 months + 4 years 5 months

2. Subtract 3h 20 min – 1 h 40 min

RECTANGLE:

A normal train from Chennai to Bangalore takes 6 hours 10
minutes. The Shatabdi Express takes 4 hours 45 minutes. How
much time do you save by travelling on the Shatabdi?

Try this!!! Exercise 13 B

Solve

3 years 7 months + 4 years 5 months.

1 h 40 min + 1h 40 min

9h 20 min – 3h 40 min

3. Application in real life.

b. Harish went to school for 11 years 6 months and college for
5 years 9 months. How many years of education is that?

Application in real life

Anisha practiced for her school elocution competition for 35
minutes on one day and 45 minutes on the next day. How long
did she practice in all ?

Solution :

Time taken by Anisha on one day = 35 minutes

Time taken by Anisha on next day = 45 minutes

Total time spent for practice

Answer 1

Answer:

An atmosphere ἀτμός, meaning 'vapour', and σφαῖρα, meaning 'ball' or 'sphere' is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body.

Answer 2

Answer:

Thermal expansion is the tendency of matter to change in shape, volume, and area in response to a change in temperature. ... The degree of expansion divided by the change in temperature is called the material's coefficient of thermal expansion. It is found to generally vary with temperature.