Question

1. Find the average of all even numbers from 20 to 30.

2. The average temperature of the room is 24.7 degree celsius, If the number of temperature observations done is 5, what is the sum of temperature values recorded?

3. Find the average marks scored by Satish:

Eng: 85 % Math: 97 % Science: 87 % SST: 76 % Hindi: 90

4. If the carpet area 121 sq m exactly covers the floor of a square room. What is the perimeter of the room?

5. An oil painting canvas is 90 cm long and 60 cm wide. A 5 cm thick wooden frame runs along its border. How much would it cost to cover the entire framed painting with glass if 1 square cm of glass cost Rs. 0.90?

Answer 1

Answer:

1. avg of even numbers between 20 to 30 are

(20+22+24+26+28+30)/5=25

2. avg temp of room =24.7

therefore 24.7= X/5

x(sum of temperature record ed values)= 24.7*5= 123.5

3.avg marks scored by Satish=

(85+97+87+76+90)/5=435/5=87

4.area of square room = 121 sqm

area of square= (side)^2=121 sqm

side=√121

side = 11 m

perimeter = 4*side= 4*11= 44

5. area of oil painting Canvas=90*60=5400sqcm

area

area covered with frame=90+5*60+5=6175sq cm

cost of glass per sq cm=0.90

cost to cover the entire framed painting with glass= 6175/0.90=5557.5