Question

Q1
If 5 kg wheat costs Rs.225,then how much wheat you can buy for Rs.450?
Q2
First bus travels 50 km in 45 min and second bus travels 75 km in40 min. Which is faster?
Q3
A rectangle field is 90 m by 70 m. A man walks around it at rate of 4 km per hour. In how much time he will cover 5 rounds?
Q4
If perimeter of triangle is 100 cm and two sides are 35cm and 30 cm, find the third .​

Answer 1

Ans.1

Given,

Price of 5 kg of wheat: ₹225

Price of one kg: ₹225/5

$= 45$

Amount of Wheat which can be brought with ₹450:

$450 \div 45 = 10$

So, 10 kg of wheat can be brought with ₹450.

Ans.2

Given,

Time taken by First bus to cover 50 km: 45 min = 3/4 hour

Time taken by Second bus to cover 75: 40 min = 2/3 hour

Speed of First Bus:

$50 \div \frac{3}{4} = 66.67$

Speed of Second Bus:

$75 \div \frac{2}{3} = 112.5$

Hence, The second bus is faster.

Ans.3

Given,

Dimensions of Rectangle field: 90m × 70m

Perimeter of Rectangle field:

$2(l + b)$

$= 2(90 + 70)$

$= 2 \times 160$

$= 320$

Speed of man: 4km per hour

Total Distance travelled: 320×5 = 1600m= 1.6km

Time taken by man to cover the rectangle field 5 times:

$\frac{distance}{speed}$

$= \frac{1.6}{4}$

$= 0.4$

Hence, the time taken by the man to cover the field 5 times is 0.4 hours or 24 minutes

Ans.4

Perimeter of Triangle: 100 cm

Length of First side: 35 cm

Length of Second Side: 30 cm

$perimeter = \: sum \: of \: length \: of \: all \: three \: sides$

$100 = 35 + 30 + third \: side$

$length \: of \: third \: side = p - (35 + 30)$

$= 100 - 75$

$= 25$

Hence, the length of third side is 25cm.

With Regards from Venom...