Multiplication of Decimal by Whole Number

Q.

Find the perimeter of an equilateral triangle whose one side is 6 cm.

Q. If the perimeter of an equilateral triangle is "a"units then what will be the length of its sides?

Q.

5 bottles are filled with oil. Each bottle can hold 0.45 litres of oil. How much oil can be filled in the bottles?

1. 225 litre

2. 2.25 litre

3. 22.5 litre

4. 2 litre

Q.

In 15.26 what are the digits at tenths and hundredths place?

1. 2 and 7
2. 2 and 6
3. 2 and 5
4. 3 and 6

Q. Ashokrao planted bananas on $\frac{2}{7}$ of his field of 21 acres. What is the area of the banana plantation?

Q.

Given that length of side of an equilateral triangle is 3.4 cm . Find its perimeter ? [3 MARKS]

Q.

The length and breadth of a rectangular park are 45.2 metres and 15 metres respectively. Calculate its area.

1. 67.8 square metres

2. 668.5 square metres

3. 6580 square metres

4. 678 square metres

Q. If the half of the perimeter of a triangle is 9 cm, find the perimeter of the triangle.

1. 6 cm
2. 18 cm
3. 8 cm
4. 20 cm

Q. Convert 480 days into years.

1. 1 year 115 days
2. 1 year 225 days
3. 1 year 25 days
4. 1 year 3 months

Q. Each tile=60cm
how many tiles required to cover a hall of
length =50m and breadth =36m

Q.

Divide $3x^3+5x^2+2x+7\mathrm{by}{x}^2+2x+3,$find the quotient and remainder and verify the division algorithm.

Q. The side of an equilateral triangle is X express the perimeter of the equilateral triangle using X

Q. The perimeter of a triangle with side lengths 12.4 cm, 13.8 cm and 16.7 cm is

1. 41.9 cm
2. 42.9 cm
3. 21.45 cm
4. 43 cm

Q. What is the perimeter of an equilateral triangle of side 4.32 cm?

1. 13.96 cm
2. 14.66 cm
3. 13.66 cm
4. 12.96 cm

Q.

Sweety runs around a square park of side 75 m. Bulbul runs around a rectangular park with length 60 m and breadth 45 m. Who covers less

distance?

Q. There are 365.25 days in each year so every 5th year will have 366 days.

1. True
2. False

Q.

Multiplying 8.5 by 100, we get ______.

1. 0.85

2. 850

3. 85

4. 8500

Q.

Write the following using numbers, literals and signs of basic operations. State what each letter represents:
(i) The diameter of a circle is twice its radius.
(ii) The area of a rectangle is the product of its length and breadth.
(iii) The selling price equals the sum of the cost price and the profit.
(iv) The total amount equals the sum of the principal and the interest.
(v) The perimeter of a rectangle is two times the sum of its length and breadth.
(vi) The perimeter of a square is four times its side.

Q.

If 1 gram of gold costs ₹175.50, then how much will 15 grams of gold cost?

1. ₹1266.50

2. ₹2632.05

3. ₹2362.15

4. ₹2632.50

Q.

If 1 gram of gold costs ₹175.50, then how much will 15 grams of gold cost?

1. ₹1266.50

2. ₹2632.05

3. ₹2362.15

4. ₹2632.50

Q. Write the following using numbers, literals and sings of basic operations. State what each letter represents:

(i) The diameter of a circle is twice its radius.
(ii) The area of a rectangle is the product of its length and breadth.
(iii) The selling price equals the sum of the cost price and the profit.
(iv) The total amount equals the sum of the principal and the interest.
(v) The perimeter of a rectangle is two times the sum of its length and breadth.
(vi) The perimeter of a square is four times its side.

Q. The chapter "Review 4" has question no. 36 on page no. 66. Explain/Solve.

Q. if the length of one side of an equilateral triangle is 10 cm, find the circum radius of the triangle.

Q. Add the following decimals:
28.9, 19.64, 123.697 and 0.354

Q. Sushma wants to buy some gifts for her parent's anniversary, so she decided to sell 4 kgs of silver. 1 gram of silver costs ₹ 20.25, what will be the total amount that she will receive?

1. ₹ 55, 000
2. ₹ 81, 000
3. ₹ 34, 000
4. ₹ 70, 025

Q.

3.8 $\times$ 6.7 =

1. 25.46

2. 254.6

3. 2.546

4. 11.5

Q.

Divide 12.8 by 4.0

1. 3.02

2. 3.2

3. 0.32

4. 320.0

Q.

A piece ofstring is 30 cm long. What will be the length of each side if the string is used to form:

(a) asquare?

(b) anequilateral triangle?

(c) aregular hexagon?