Page 21 - Maths Skills - 7
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Integers 19
and unsold inventory. Unfortunately, a significant (c) A is true but R is false.
portion of this waste ends up in landfills, straining
natural resources and contributing significantly to (d) A is false but R is true.
environmental pollution. Q. 1. Assertion (A): When a positive integer is
Considering the magnitude of fashion waste, multiplied by zero then the
approximately 400 landfills would each process a product is always zero.
portion of this waste. To mitigate the environmental Reason (R): Zero is the multiplicative identity
impact, recycling efforts have gained traction. for integers.
Recycling initiatives can redirect a portion of the
discarded material, contributing to a more sustainable Q. 2. Assertion (A): When two positive integers are
approach. multiplied then the product is
always a positive integer.
Answer the following questions on the basis of the
above data. Reason (R): A positive integer is any integer
1. If a dumping site is located 15 km 250 meters greater than zero.
away from a city, what will be the round trip
distance covered in a week to transport? SUBJECTIVE TYPE QUESTIONS
2. If there are 400 landfills, how much waste would F. Solve the following word problems
each process annually? (Calculate answer in tons)
3. If 12 million tons of fashion waste can be 1. An elevator is 25 m below the ground level and
it ascends at the rate of 5 m/min. Find the time
recycled in a month, how much would that taken by it to reach 50 m above the ground.
amount be recycled in a year?
2. Imagine that you are a fighter pilot flying a jet
E. Assertion-Reason Based Questions aircraft at an altitude of 20,000 feet. You lower
Directions for Questions 1 to 2: In each of the the aircraft by 7,000 feet and then raise it by
5,000 feet. What is the net change in the altitude?
questions given below, there are two statements Also find the altitude after the two changes.
marked as Assertion (A) and Reason (R). Mark your
answer as per the codes provided below: 3. Raghu has 30 marbles. In 5 games he won
(a) Both A and R are true and R is the correct 3 marbles each and in 7 games he lost 2 marbles
each. Find the marbles Raghu has at the end of
explanation of A. the games.
(b) Both A and R are true but R is not the correct
explanation of A.
INTEGRATED QUESTION
G. Science Vs Maths
There are different planets having different surface temperature in our solar system. Planet, farther from the
sun, becomes colder. Venus is the exception and the hottest planet. The table below shows mean temperature of
different planets in Fahrenheit. Convert these temperatures into Celsius by using the formula given below:
5
C = (F–32)
9
