DXC Quants Mensuration Quiz 4

Solution:

Area = √3 / 4 (16)² ==64√3  cm² .

Solution:

Speed = 12 kmph = 12 x   = 200

In 8 minutes it travels = 200x8 = 1600 m

Perimeter = 1600 m

L:B = 3:2

=

1600 = 2 x

= 160

L =  = 3x160 = 480 m

And B =  = 2x160 = 320 m

Area = 480x320 sq. m = 153600 sq. m

Solution:

Area of each mousetrap = 15x20 = 300 sq. cm

Area occupied by 100 mousetraps = 300x100 = 30000 sq. cm = 3 sq. m

Area of room = 5x3.6 = 18 sq. m

Space left for Jerry = 18-3 = 15 sq. m

Explanation : root 10/ 2

Solution:

Total Surface Area = πr (r+l)

=  x 7 x (12+7)

= 418 sq. m

Solution:

Shape will of two cones one over the other with

One is in invert position than other.

Surface = 2 x rl

= 2 x  x   x 9

= 360 m²

Explanation : Semi perimeter of square = 18cm Area of square = 81 cm² When Square bent into circle  radius will be = 9 cm Area of circle = 81×22/7 cm² Hence  , ratio of area of circle to area of square = 22/7.

Solution:

Surface area of cube = 6 x side²

After doubling each side

New surface area of cube = 6x4xside² = 24side²

Percentage increase in Area =  x 100 = 300 %

Solution:

V1 = V2

1 m3 = 8 x  m3 ( is the thickness of the gold piece)

=  m =  = 12.5 cm

Solution:

Total Surface Area = 2 [ 5x6 + 6x12 + 12x5 ]

= 324 sq. inches