Question

A playground measures 300m by 170 m . find the cost of planting grass on this at the rate of Rs 80 per hectare​

Answer 1

Given: Length of the playground is 300m, breadth is 170m and the rate is 80 rupees per hectare.

To find: The total cost.

Answer:

Let us first find the area of the field.

Area = length*breadth

Substituting the given values,

Area = 300*170 = 51000m^2

Now let us convert this measure to hectares.

To convert m^2 to hectares, we have to divide the area by 10000.

So 51000m^2 = 51000/10000 = 5.1 hectares.

Now cost per hectare = 80.

Therefore cost for 5.1 hectares = 80*5.1 = 408 rupees.

Answer 2

$\huge \purple{ \underline{ \boxed{ \red{ \mathbb{ANSWER : }}}}}$

$\red{ \textsf{The cost of planting grass on the playground is \orange{Rs.408 .}}}$

$\huge \purple{ \underline{ \boxed{ \red{ \mathbb{EXPLANATION : }}}}}$

$\large\green{ \underline{ \underline{ \mathbb{GIVEN : }}}}$

$\orange{ \textsf{Length of playground = 300 m }}$

$\orange{ \textsf{Breadth of playground = 170 m }}$

$\orange{ \textsf{Cost of planting grass per hectare = Rs.80}}$

$\large\green{ \underline{ \underline{ \mathbb{FORMULA \: USED : }}}}$

$\orange{ \textsf{Area of rectangle = Length x Breadth}}$

$\orange{ \sf{1 \: hectare = 10000 \: {m}^{2} }}$

$\large\green{ \underline{ \underline{ \mathbb{SOLUTION : }}}}$

$\red{ \textsf{Area of playground = Length x Breadth}}$

$\red{ \textsf{Area of playground = 300 x 170}}$

$\red{ \sf{Area \: of \: playground = 51000 \: {m}^{2} }}$

$\red{ \sf{Area \: of \: playground = 5.1 \: hectare }}$

$\red{ \textsf{Cost of planting grass per hectare = Rs.80}}$

$\red{ \sf{Cost \: of \: planting \: grass \: 5.1 \: hectare = 5.1 \times 80}}$

$\red{ \sf{Cost \: of \: planting \: grass \: 5.1 \: hectare = Rs. \: 408 }}$

$\large \green{ \underline{ \underline{ \mathbb{KNOW \: MORE : }}}}$

$\orange{\mathbb{AREA : }}$

The area is the measurement of space enclosed by a closed geometric figure .

$\orange{ \mathbb{HECTARE :}}$

The hectare is a non-SI metric unit of area equal to 10,000 m² .