- Four goats are tehtered at 4 corners of a square field of side 60 metres so that they just cannot reach one another.Find the area left ungrazed by the goats?
650 m680 m771 m750 mNone of theseOption C

Lenght=60/2=30 m

Total area =22*30*30/7

Ungrazed area=Area of square field – area covreed by 4 goats

=3600 – 2829 - If the sides of a traingle measures 64 cm , 72 cm and 20 cm,what is the measure of its radius?
6 cm5 cm9 cm8 cmNoe of theseOption D

Radius=64 *20 /64 + 72 +20 = 1280 / 156 = 8.20 cm - the width of a rectangle is 10 meters and its area is 120 square metre.If length of the rectagle is increased by 6 cm,what is the new perimeter of the rectangle?
42 cm48 cm45 cm50 cm56 cmOption E

lenght=120/10 = 12

then,12+6=18 cm

P=2(l+b) = 2(10+18)=56 cm - What will be the cost of painiting a room whose area is 300 square metre ,if the rate of painiting per square metre is Rs 24?
Rs 1250Rs 1540Rs 1548Cannot be determinedNnone of theseOption D

Room shape not given and its parameter not given - If the length of rectangle is increased by 20 percent,by what percent should width be reduced to maintain same area?
10.2512.5013.3516.66None of theseOption D

Let l=100 and b=100

New l=120

Therefore,100*100=120*b

b=250/3

Percentage decrease =100-250/3 - A rectangular gardenn is 30 m long and 20 m broad.It has 6 m wide pavements all around it both inside and outside.Find the total area of pavements?
1600 cm1425 cm1500 cm1200 cmNone of theseOption D

Area=42*32 – 18*8

=1344 -144 - The radius of a wheel of a truck is 70 cm.How many revolutions per minute the wheel will make in order to make speed of 66 km/hr?
260255250275280Option C

Distance in 1 minute =66*(100/60)=1100 m

Circumference =2 *22/7 * 0.70 = 4.4 m

No of revolutions=(1100/4.40) - What is the volume of a cyclinder whose curved surface area is 700 cm^2 and height is 14 cm?
2816275429842800None of theseOption A

2*pie*r*h=700

2*3.14*r*14=700

r=7.96 = 8

Then,Volume=pie*r^2 * h - A hall has floor size of 15*6 sq cm.What is the height of the hall if the sum of the areas of base and roof is equal to sum of areas of four walls?
3.253.544.295.02None of theseOption C

2lb=2h(l+b)

h=l*b / l+b - A goat is thetered to a cow with 16 cm long rope at corner of 31 cm long and 27 cm wide recatngular grass field.What area of field wll goat graze?
200.0201.1205.25206.50None of theseOption B

Area=(22*16*16/7)/4