Page 136 - Start Up Mathematics_5

3. Mr Sharma takes 1 h 10 min to reach his office daily. If he goes to office 6 days in a
week, how many hours does he spend going to his office in the month of February
in a non-leap year?

4. A daily wage worker works for 5½ h a day. For how many hours does he work in a week?

5. A bus takes 3 h 40 min to go from city A to city B and 1 h 55 min to go from city B
to city C. How much time does the bus take to go from city A to city C?
6. Look at the railway timetable given in Example 8 and answer the following questions.

(a) If a passenger boards train number 12006 from Chandigarh, in how many hours
will he reach New Delhi?
(b) If a passenger boards train number 12011 from Kalka to Ambala, how many hours
will he have to travel? Will he take the same time if he travelled by train number
12006?

Temperature

Its too hot today. The temperature is 43°C.

Don’t worry! At night the temperature will
come down to 35°C.

You all must have heard such statements many times. But have you ever wondered what
this temperature is!

Temperature is the measure of degree of hotness or coldness of
a body.
Temperature is measured in either degree Celsius (°C), i.e., centigrade
or degree Fahrenheit (°F).

The instrument used for measuring temperature is called
thermometer.

In the Celsius scale, the thermometer is marked from 0°C Know More
to 100°C. 0°C denotes the freezing point of water and
100°C denotes the boiling point of water. The thermometer that we
Similarly in the Fahrenheit scale, the thermometer is use for measuring our body
temperature is called clinical
marked from 32°F to 212°F. 32°F denotes the freezing point thermometer.
of water and 212°F denotes the boiling point of water.

So, 0°C = 32°F 100°C = 212°F

Let’s now learn to convert temperature in °C to temperature in °F and vice versa.

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