Question

solve all the questions

Answer 1

11 ] a = 6cm
area of square
= a²
= (6 cm)²
= 36 cm²

radius = r = 2cm
area of circle
= πr²
= 3.14×4cm²
= 12.56 cm²
area of the left over aluminium sheet is
= area of square - area of circle
= 36 cm² - 12.56 cm²
= 23.44 cm²

12 ]
circumference of circle = 31.4 cm
π × 2r = 31.4
3.14 × 2r = 31.4
6.28 × r = 31.4
r = 31.4/6.28
r = 5 cm

radius = r = 5cm
area of circle
= π × r²
= 3.14 × 25cm²
= 78.5 cm²

16 ]
circumference of wheel
= π × 2r
= 22/7 × 2 × 28
= 176 m
if a wheel rotate one time it covers 176 m
how many it take to rotate to cover 352 m
1 : ? :: 176m : 352m
= 352/176
= 2
so it covers 352 m if the wheel rotate 2 times

14 ]
area of entire garden = 314m²
radius of the sprinkler water = r = 12m
area of sprinkler water
= πr²
= 3.14× 144m²
= 452.16 m²
yes it is spred the water entire garden because it covers greater area then garden area

17]
minute hand moves in circular path
so we find it's circumference
take r = 12cm
= C
= π2r
= 3.14×2×12cm
= 75.36cm
so it moves 75.36 cm in one minute
1 hour = 60 minute

75.36×60
= 4521.6 cm
so minute hand moves 4521.6 cm in 1 hour

but
13 and 15 th questions figures is missing