State if the following statements are True or False. Correct the false statement. 1. Force arises due to the interaction between two objects. 2. Force cannot act on an object without being in contact with it. 3. A physical balance is used to measure force. 4. A wooden block slides more easily on a smooth cemented floor than on rollers. 5. A force that acts on an object never changes its shape. 6. The contact force can act through a distance, 7. While sitting in a car, you are in continuous motion with regards to the driver. 8. Missiles are streamlined in shape to increase the force of friction.
Answers
Answer:
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TEXT BOOK EXERCISE
Subject: MATHEMATICS
Class – VIII
Chapter: 8 Percentage and its applications
EXERCISE 8.1
Q 12 Vikram got an increase of 10% in his salary. If the salary after increase was
Rs. 36355, find his salary before increase. Q 14 60% students in a school are boys. Find the total number of students in the
school if 120 are girls. Q 17 On a crossing, when the lights are on( during one cycle ), the vehicles which
cross the green light comprise 50% four wheelers, 35% two wheelers and the rest
three wheelers. If 30 three wheelers cross the light, how many four wheelers and
two wheelers cross during same period?
Q 20 The value of a car depreciates 20% every year. If after two years the price of
a car is Rs. 208000, find its original price. EXERCISE 8.2
Q 8 A shopkeeper bought wheat for Rs. 35000. Due to leakage in the godown 1/7
of the total wheat was spoiled. He sold the good wheat at a gain of 10% and the
spoiled wheat at a loss of 25%. Find his total gain or loss %. Q10 A shopkeeper buys 5 fans for Rs. 4050. He spends Rs. 50 on the
transportation, and sells them at a gain of 15%. Find the selling price of a fan. Q 14 By selling a chair for Rs. 500, Raman loses 10% . For how much should he
sell the chair so as to gain 8%.
Answer:
1.) False
2.) True
3.) True
4.)False
5.)False
6.)False
7.) True
8.) True
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