Chapter 2 (2.2) questions:-15,16

CBSE, JEE, NEET, NDA

CBSE, JEE, NEET, NDA

Question Bank, Mock Tests, Exam Papers

NCERT Solutions, Sample Papers, Notes, Videos

Chapter 2 (2.2) questions:-15,16
  • 3 answers

Lalita Devi 3 weeks, 6 days ago

Que no 14

Deekshu 😀 1 month ago

Ex 2.2 Class 8 Maths Question 16. The organisers of an essay competition decide that a winner in the competition gets a prize of ₹ 100 and a participant who does not win gets a prize of ₹ 25. The total prize money distributed is ₹ 3,000. Find the number of winners, if the total number of participants is 63. Solution: Let the number of winners = x Number of participants who does not win the prize = (63 – x) Amount got by winners = ₹ 100 × x = ₹ 100x Amount got by loosers = ₹ (63 – x) × 25 = ₹ (1575 – 25x) As per the conditions, we get 100x + 1575 – 25x = 3000 ⇒ 75x + 1575 = 3000 ⇒ 75x = 3000 – 1575 (transposing 1575 to RHS) ⇒ 75x = 1425 ⇒ x = 1425 ÷ 75 (Transposing 75 to RHS)  ⇒ x = 19 Thus, the number of winners = 19

Deekshu 😀 1 month ago

Ex 2.2 Class 8 Maths Question 15. I have a total of ₹ 300 in coins of denomination ₹ 1, ₹ 2 and ₹ 5. The number of ₹ 2 coins is 3 times the number of ₹ 5 coins. The total number of coins is 160. How many coins of each denomination are with me? Solution: Let the number of ₹ 5 coins be x. Number of ₹ 2 coins = 3x Total number of coins = 160 Number of ₹ 1 coin = 160 – (x + 3x) = 160 – 4x Converting the number of coins into rupees, we have x coins of ₹ 5 amount to ₹ 5x 3x coins of ₹ 2 amount to ₹ 3x × 2 = ₹ 6x and (160 – 4x) coins of ₹ 1 amount to ₹ 1 × (160 – 4x) = ₹ (160 – 4x) As per the conditions, we have 5x + 6x + 160 – 4x = 300 ⇒ 7x + 160 = 300 ⇒ 7x = 300 – 160 (transposing 160 to RHS) ⇒ 7x = 140 ⇒ x = 140 ÷ 7 (transposing 7 to RHS) ⇒ x = 20 Thus, number of ₹ 5 coins = 20 Number of ₹ 2 coins = 3 × 20 = 60 and Number of ₹ 1 coins = 160 – 4 × 20 = 160 – 80 = 80
http://mycbseguide.com/examin8/

Related Questions:

5x+2=3x+1
  • 4 answers
Ksjdjdjiewk
  • 1 answers
Solve the equation x /3 +1=7/15
  • 1 answers
The daigonals of parallelogram are equal
  • 1 answers
What is divided
  • 2 answers
(1\3+3/2 ) add
  • 1 answers

myCBSEguide App

myCBSEguide

Trusted by 1 Crore+ Students

CBSE Test Generator

Create papers in minutes

Print with your name & Logo

Download as PDF

3 Lakhs+ Questions

Solutions Included

Based on CBSE Blueprint

Best fit for Schools & Tutors

Work from Home

  • Work from home with us
  • Create questions or review them from home

No software required, no contract to sign. Simply apply as teacher, take eligibility test and start working with us. Required desktop or laptop with internet connection