Curioustab

Home » Aptitude » Volume and Surface Area

Three solid cubes of sides 1 cm, 6 cm and 8 cm are melted to form a new cube. Find the surface area of the cube so formed

486
586
686
786

Correct Answer: 486

Explanation:

Volume of new cube = $13 + 63 + 83 c m 3$ = $729 c m 3$

Edge of new cube = $7293$ = 9cm

Surface area of the new cube = ( 6 x 9 x 9) sq.cm = 486 sq.cm

← Previous Question Next Question→

More Questions from Volume and Surface Area

The dimensions of an open box are 50 cm, 40 cm and 23 cm. Its thickness is 2 cm. If 1 cubic cm of metal used in the box weighs 0.5 gms, find the weight of the box.
A town has a population of 4000 requires 140 liters of water per head. It has a tank measuring 18m x 12m x 8m. The water of this tank will suffice for ____ days?
50 men took a dip in a water tank 40 m long and 20 m broad on a religious day. If the average displacement of water by a man is 4 cu.m , then the rise in the water level in the tank will be:
The size of the wooden block is 5 x 10 x 20 cm .How many such blocks will be required to construct a solid wooden cube of minimum size?
A cistern of capacity 8000 litres measures externally 3.3 m by 2.6 m by 1.1 m and its walls are 5 cm thick. The thickness of the bottom is:
Find the length of the longest pole that can be placed in a room 12 m long 8m broad and 9m high.
In a shower, 5 cm of rain falls. The volume of water that falls on 1.5 hectares of ground is:
Two cones have their heights in the ratio 1:3 and the radii of their bases in the ratio 3:1. Find the ratio of their volumes.
A hollow iron pipe is 21 cm long and its external diameter is 8 cm. If the thickness of the pipe is 1 cm and iron weighs 8g/cu.cm, then the weight of the pipe is
The slant height of a right circular cone is 10 m and its height is 8 m. Find the area of its curved surface

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion