Question

1-The height if cone is 24cm and its slant height is 25cm.find its diameter?
a)14cm
b)7cm
c)4cm
d)49cm
2-The side of a triangle is 8cm,12cm,and 6cm.Then the semi-perimeter is?
a)26cm
b)13cm
c)52cm
d)6.5cm
3-PQRS is a square if PQ=10 then,PR is?
a)10✓2cm
b)10cm
c)20cm
d)None​

Answer 1

Answer:

slant height=l

height=h

l=25

h=24

by Pythagoras theorem

Hypotenuse square= base square + perpendicular square

25square= base square + 25 square

625= base square + 576

base square = 576-625=49

base=√49 = 7

diameter = 2*radius

2*7=14

ANSWER-14