Question

8. Due to heavy snow the temperature in Leh plummeted to -13°C from 2°C. During that period,
temperature in Delhi fell to 4°C from 16°C. In which city is the temperature fall greater?
9. The height of a lighthouse is 60 m and the depth of the seabed is 14 m. Above the lighthouse is a tower of
height 7 m for signal purposes. Find the total height of the structure.
10. The sum of two integers is 2020. if one of them is -2020 , then what is the other integer?
11. Vikram gained Rs 450 in one transaction and lost of Rs 880 in another transaction. What would be his final
gain or loss?
12. The difference between the integer m and (-17) is (-2). Find the value of m.​

Answer 1

Answer:

8) In Leh

9) 81 m

10) 4040

11) Loss = Rs 430

12) (-19)

Step-by-step explanation:

8) Temperature difference in Leh = 2 - (-13) = 2 + 13 = 15°C

Temperature difference in Delhi = 16 - 4 = 12°C

15 is greater than 12. Hence the temperature fall greatly in Leh.

9) Height of a lighthouse = 60 m

Depth of the seabed = 14 m

Height of the tower = 7 m

Total height of the structure = 60 + 14 + 7 = 81 m

10) Sum = 2020

One integer a = -2020

Other integer = Sum - a = 2020 - -(2020) =2020+2020

= 4040

11) Let the amount invested be 'x'

He gained Rs 450 first. Now he has (x + 450) rupees.

Then he lost Rs 880. Now he has (x + 450 - 880) rupees.

x + 450 - 880 = x - 430

Here we can see that he has lost (- sign) 430 rupees from the actual amount he invested (x).

So, loss = 430

12) m - (-17) = -2

m + 17 = -2

m = -2 - 17 = -19

Hope it helps :)