A. 8: 1
B. 2√2 : 1
C. 2 : 1
D. None of these
Explanation:
Volumes be 8×3 and x3
2x and x respectively
Therefore, Ratio of their edges = 2 : 1
A. 284 cm2
B. 286 cm2
C. 296 cm2
D. 300 cm2
Explanation:
Volume of sheet = (27 × 8 × 1)cm3 = 216 cm3
Volume of cube formed = 216 cm3
Therefore, Edge of the cube = (6 × 6 × 6)1/3 = 6 cm
Surface area of original cuboid = 2 (27 × 8 + 8 × 1 + 27 × 1) cm2 = 502 cm2
Surface area of the cube formed = [6 × (6) 2] cm2 = 216 cm2
Therefore, Difference in areas = (502 – 216)cm2= 286 cm2
A. 1200000
B. 1000000
C. 9800000
D. 7500000
A. 90, 85, 60
B. 85, 75, 60
C. 90, 75, 70
D. 90, 75,60
Explanation:
Length = 6x
Breadth = 5x
Height = 4x in cm
Therefore, 2(6x × 5x + 5x × 4x + 6x × 4x) = 33300
148×2 = 33300
=> x2 = 33300/148 = 225
=> x = 15.
Therefore, Length = 90cm,
Breadth = 75cm,
Height = 60cm
90, 75 , 60 cm
A. 1300 m3
B. 1331 m3
C. 1452 m3
D. 1542 m3
6a2 = 726
=> a2 = 121
=> a = 11 Cm
Therefore, Volume of the cube
= (11 × 11 × 11) cm3 = 1331 cm3
A. 3:8
B. 9:16
C. 9:32
D. 9:64
A. 1:64
B. 1:8
C. 1:4
D. 8:1
A. 3:4
B. 9:16
C. 1:8
D. 4:3
A. 1:2
B. 1:4
C. 2:1
D. 4:1
A. 1:2
B. 1:4
C. 1:8
D. 2:1