Answer:
M=15
J=20
Step-by-step explanation:
Let J and M be the present age of John and Mary respectively:
J=M+5
2(J+10)−(M+10)=35
2(M+5+10)−(M+10)=35
2M+30−M−10=35
M=15
J=20
Answer:
1
Step-by-step explanation:
4-3=1 denominator never changes may i be marked brainliest?
Answer:
let ratio 4:5 be 4x& 5x
according to the question
5x=75
x=75/5=15
the number of Maths books=4x=4×5=20 is your answer
Answer:
.
Step-by-step explanation:
Let's say that the radius is r. The base diameter is two times the radius, or 2r.
Since the height is two times the diameter, the height is 2 * 2r = 4r.
The volume of a cone is 1/3 * h * pi * r^2. So, the volume of the cone is 1/3 * 4r * pi * r^2 = 1/3 * pi * 4r^3 = 4/3 * pi * r^3.
So, the volume of the cone is
.
Hope this helps!