SChand New Learning Composite Mathematics Class 7 Chapter 1 Integers Exercise 1F

 Exercise 1F

Question 1

A submarine submerged at a depth of -15 m, dives 20m more. What is the new depth of the submarine.

Sol :


Question 2

The temperature was -3°C in the morning and rose by 10°C by the non. What was the temperature at the noon?

Sol :


Question 3

The day time temperature on Mercury can reach 430°C.  The night time temperature can drop to -180°C how much can the temperature change during one day?

Sol :



Question 4

The lowest point of the Japanese trench in Pacific Ocean -10372 m. The lowest point of the Puerto Rico trench in the Atlantic Ocean is 1172 m higher . What is the depth of the Puerto Rico trench?

Sol :


Question 5

A submarine at -250 m dives to a depth of 6 times its initial depth. To what depth does the submarine dive?

Sol :


Question 6

The Temperature at 12 noon was 10°C above zero. If it decreases at the rate of 2°C/h until midnight at what time would be the temperature at midnight?

Sol :


Question 7

A multi-storey building has 25 floor above the ground level, each of height 5 m. It also has 3 floor in the basement each of height 5m. A lift in the building moves at the rate of 1m/s. If a man start from 50 m above the ground how long will it take to him to reach the second floor of the basement?

Sol :


Question 8

Ar a target shooting star in a fair , for every chance a person got he was paid 15 if he hit the target, and would have to pay 5 to the store keeper for every shot he missed how much money did Manish make if his shot a total of 25 times and missed 5 times?

Sol :


Question 9

A person earned 400 per day and out of this he is spent 225 per day. Calculate his savings for the month of June.

Sol :



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