All categories

2 years ago

Q..3/4 of a piece of metal has a mass on 15 kg. What is the mass of 2/5 of a piece of metal ?

Mathematics

1 answer:

Margarita [4]2 years ago

8 0

Answer

8kg

Explanation

3/4--------15

2/5-------x

cross multiplying

3/4×X = 2/5×15

3X/4 = 30/5

3X/4 = 6

cross multiplying

3X = 4×6

3X = 24

dividing bothsides by 3

3X /3 = 24/3

X = 8

therefore, the answer is 8 kg

You might be interested in

I need help with 3 and 4 please

STatiana [176]

Answer:

How are we suppose to answer this on this website?

Step-by-step explanation:

4 0

3 years ago

betty closes the nozzle and fills it completely with a liquid. She then opens the nozzle. If the liquid drips at the rate of 14

natta225 [31]

Answer:

4.71 minutes

Step-by-step explanation:

Incomplete question [See comment for complete question]

Given

Shape: Cone

$r = 3$ -- radius

$h = 7$ --- height

$Rate = 14in^3/min$

Required

Time to pass out all liquid

First, calculate the volume of the cone.

This is calculated as:

$V = \frac{1}{3} \pi r^2h$

This gives:

$V = \frac{1}{3} * 3.14 * 3^2 * 7$

$V = \frac{1}{3} * 197.82$

$V = 65.94in^3$

To calculate the time, we make use of the following rate formula.

$Rate = \frac{Volume}{Time}$

Make Time the subject

$Time= \frac{Volume}{Rate }$

This gives:

$Time= \frac{65.94in^3}{14in^3/min}$

$Time= \frac{65.94in^3}{14in^3}min$

Cancel out the units

$Time= \frac{65.94}{14} min$

$Time= 4.71 min\\$

3 0

2 years ago

Dimitri drew a right angle. Then he drew an angle that was 20° larger. What is the measure of the second angle Dimitri drew?

marysya [2.9K]

Right angle is 90 degrees. 90 + 20 = 110 degrees

4 0

3 years ago

Read 2 more answers

In physics, kinetic energy is the energy of an object in motion. Kinetic energy, K, measured in joules (J), is

Kryger [21]

Answer:

$m = \frac{2k}{v^{2} }$

Step-by-step explanation:

$k = \frac{1}{2} mv ^{2}$

$v ^{2} m = 2k$

$m = \frac{2k}{v ^{2} }$

5 0

3 years ago

Statistics help!

Alina [70]

Answer:

I wish I knew... im sorry bro

4 0

3 years ago