A horse is tethered to a stake by a rope of 30 m long. If the horse moves along the circumference of a circle keeping rope tight, find that how far the horse have gone from initial point if the rope has traced an angle of 105° at the centre ?
55 m
5.5 m
155 m
25 m
Two sheets of paper with measure 22 cm by 28 cm are taken. Each sheet is then rolled into a cylinder, one having the height 22 cm and the other of height 28 cm. The difference in their volumes (in cm3) will be
216
294
316
0
If the radius of the circle is increased 3 times, then how many times the new circumference increase from its original size ?
3
9
None of these
A.
3
Let r and r' be the original and new radius. Original circumference = 2r
New, circumference = 2r'
So, new circumference will increase 3 times from its original size
How many bricks will be required to construct a wall 3 m long, 1.5 m high and 0.4 m thick, if each brick measures 30 cm x 15 cm x 8 cm ?
502
550
500
501